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CyberPower 4POSTRAIL 4-Post Universal Rack Mount Rail Kit, Silver

4.3 4.3 out of 5 stars 197 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Computer Racks & Cabinets by CyberPower
$35.99
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Rail Kit
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Purchase options and add-ons

  • The universal 4POSTRAIL kit can be used with 1U, 2U, and 3U equipment up to 231 pounds
  • ADJUSTABLE RAILS: Extend from 18.5” to 29” for proper fit with various sizing requirements
  • 4-POST MOUNTING: Secures equipment at both the front and back of the rack
  • ATTACHMENT HARDWARE INCLUDED: 16 M5 x 12 screws are included to secure the rails to each post
  • LIMITED 5-YEAR WARRANTY
› See more product details

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CyberPower 4POSTRAIL 4-Post Universal Rack Mount Rail Kit, Silver

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What's in the box

  • 4-Post Universal Rack Mount Rail Kit

    • Product Description

    The CyberPower 4POSTRAIL 4 post rack mount rail kit provides a universal mounting solution for 1U, 2U, and 3U equipment weighing up to 231 pounds. The adjustable rails can be expanded from 18.5" to 29" to support various sizing requirements. The necessary attachment hardware is included. assembly, and material or workmanship. Contents: 2 Rails (Right and Left) M4 x 8 Screws (Qty. 6) M5 x 12 Screws (Qty. 16) FEATURES & BENEFITS 1U, 2U, 3U Support - The universal 4POSTRAIL kit can be used with 1U, 2U, 3U, and supports equipment that weighs up to 231 pounds. Adjustable Length - The rails adjust from 18.5" to 29" for proper fit into various sizing requirements. 4-Post Mounting - Secures equipment at both the front and back of the rack. Mounting Hardware Included - Sixteen (16) M5 x 12 screws are included to secure the rails to each post..

    Customer reviews

    4.3 out of 5 stars
    4.3 out of 5
    197 global ratings

    Customers say

    Customers like the sturdiness, ease of installation, performance, and value of the av furniture. For example, they mention it's very solid, works as expected, and the included mounting hardware is of decent quality. That said, opinions are mixed on fit.

    AI-generated from the text of customer reviews

    11 customers mention11 positive0 negative

    Customers are satisfied with the sturdiness of the av furniture. They mention that it's very solid, built like a brick, and has a nice adjustable range. The quality is good, and the included mounting hardware is of decent quality. Overall, most are happy with the quality and functionality of the product.

    "...This one fits the bill perfectly. It's a good price for a very solid rail that holds the Cyberpower 2000va/1540 UPS without any issues...." Read more

    "Built like a brick, straightforward to assemble, nice adjustable range, reasonably priced- what’s not to like?I’ve tried it all...." Read more

    "...initial uncertainty on how to mount the UPS and the rail, it seems rather sturdy; I like that the rails themselves have screws in them for extra..." Read more

    "...See photos.Otherwise, it seems like an excellent set of rails. I will be returning it since I can't use it with my rack cabinet." Read more

    7 customers mention7 positive0 negative

    Customers find the installation process of the av furniture to be easy. They mention that it's straight forward and easy to understand.

    "Built like a brick, straightforward to assemble, nice adjustable range, reasonably priced- what’s not to like?I’ve tried it all...." Read more

    "...Installation wasn't much of a problem. Sizing the rails to my rack had to be done first before locking the spacing down...." Read more

    "...Not too worried, seems pretty straight forward....until I realized almost all of the rails (minus one whole rail!)..." Read more

    "Installed very easily, however some of the included cage nuts couldn't hold the screw in place without twisting and breaking." Read more

    5 customers mention5 positive0 negative

    Customers are satisfied with the performance of the av furniture. They mention that it is sturdy and works as expected.

    "...These work perfectly." Read more

    "...The rails worked as expected and I would use them again. I wish the screws that adjust depth were more flush but that is minor." Read more

    "Works great - no problems to report and very easy to install!" Read more

    "Sturdy and works as expected" Read more

    5 customers mention5 positive0 negative

    Customers appreciate the value of the av furniture.

    "...This one fits the bill perfectly. It's a good price for a very solid rail that holds the Cyberpower 2000va/1540 UPS without any issues...." Read more

    "...a brick, straightforward to assemble, nice adjustable range, reasonably priced- what’s not to like?I’ve tried it all...." Read more

    "Pros:Very well priced rail.Comes with all the mounting accessories.Good strong steel.Cons:..." Read more

    "...Seems like a small oversight that has a big impact, otherwise value is great." Read more

    7 customers mention4 positive3 negative

    Customers are mixed about the fit of the AV furniture. Some mention that it's a perfect fit for the Silverstone RM42-502, with no alignment issues for the rack's holes. However, others say that it is too long/deep even at its shortest length and does not sit flush.

    "...My rack is 22" in depth and standard 19" wide. These rails adjusted easily into...." Read more

    "...Does not fit my AxcessAbles 4-post rack cabinet. Its too long/deep even at its shortest length and does not sit flush to the posts which does not..." Read more

    "Built like a brick, straightforward to assemble, nice adjustable range, reasonably priced- what’s not to like?I’ve tried it all...." Read more

    "It did not fit the installation that I needed it for...." Read more

    3 customers mention0 positive3 negative

    Customers are dissatisfied with the instructions provided with the av furniture. They mention that there is no manual and no documentation in the box.

    "The box came with the rails and some mounting hardware but no manual...." Read more

    "It starts with the fact there is 0 documentation in the box. Not too worried, seems pretty straight forward......." Read more

    "I used it for CyberPower UPS and worked right up.It doesn't come with manual but you really don't need one as it's easy to understand...." Read more

    Solid. Simple. Works.
    5 Stars
    Solid. Simple. Works.
    Couldn't find a decent sliding rail kit so I finally opted for an adjustable rail. This one fits the bill perfectly. It's a good price for a very solid rail that holds the Cyberpower 2000va/1540 UPS without any issues. That ups weighs ~60lbs and the rails don't break a sweat supporting it.I went ahead and just ordered another for my first rack-mounted pc case. Ended up just resting that finished pc on top of the ups while I waited for the second set of rails to come in. No bowing, sagging or even the slightest hint of straining from these rails with the ups (~60lbs) and pc (~37lbs).My rack is 22" in depth and standard 19" wide. These rails adjusted easily into.I was pleasantly surprised that Cyberpower included m6 screws with a thin, flat head so that you can still use standard m6 screws on the mounting ears of whatever item you're resting on these rails.Since I don't suspect I'll be sliding things in and out often for the need of a sliding rail kit, I'll probably just stick with these as I continue adding other devices to my rack.
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    Top reviews from the United States

    S2Media
    5.0 out of 5 stars Solid. Simple. Works.
    Reviewed in the United States on June 16, 2022
    Style: Rail KitVerified Purchase
    Couldn't find a decent sliding rail kit so I finally opted for an adjustable rail. This one fits the bill perfectly. It's a good price for a very solid rail that holds the Cyberpower 2000va/1540 UPS without any issues. That ups weighs ~60lbs and the rails don't break a sweat supporting it.

    I went ahead and just ordered another for my first rack-mounted pc case. Ended up just resting that finished pc on top of the ups while I waited for the second set of rails to come in. No bowing, sagging or even the slightest hint of straining from these rails with the ups (~60lbs) and pc (~37lbs).

    My rack is 22" in depth and standard 19" wide. These rails adjusted easily into.

    I was pleasantly surprised that Cyberpower included m6 screws with a thin, flat head so that you can still use standard m6 screws on the mounting ears of whatever item you're resting on these rails.

    Since I don't suspect I'll be sliding things in and out often for the need of a sliding rail kit, I'll probably just stick with these as I continue adding other devices to my rack.
    Customer image
    S2Media
    5.0 out of 5 stars Solid. Simple. Works.
    Reviewed in the United States on June 16, 2022
    Couldn't find a decent sliding rail kit so I finally opted for an adjustable rail. This one fits the bill perfectly. It's a good price for a very solid rail that holds the Cyberpower 2000va/1540 UPS without any issues. That ups weighs ~60lbs and the rails don't break a sweat supporting it.

    I went ahead and just ordered another for my first rack-mounted pc case. Ended up just resting that finished pc on top of the ups while I waited for the second set of rails to come in. No bowing, sagging or even the slightest hint of straining from these rails with the ups (~60lbs) and pc (~37lbs).

    My rack is 22" in depth and standard 19" wide. These rails adjusted easily into.

    I was pleasantly surprised that Cyberpower included m6 screws with a thin, flat head so that you can still use standard m6 screws on the mounting ears of whatever item you're resting on these rails.

    Since I don't suspect I'll be sliding things in and out often for the need of a sliding rail kit, I'll probably just stick with these as I continue adding other devices to my rack.
    Images in this review
    Customer image Customer image
    Customer imageCustomer image
    3 people found this helpful
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    Ian Ward
    4.0 out of 5 stars Didn't come with manual--found it online, but it was only partially useful anyway
    Reviewed in the United States on March 1, 2021
    Style: Rail KitVerified Purchase
    The box came with the rails and some mounting hardware but no manual. I found the manual online, which shows how to mount both a 1U and a 2U UPS; however, the manual gave the impression that you should put in screws right where the UPS had screwholes. I have the CyberPower OR1500LCDRT2U (1500VA) unit.

    If you have the same (or similar unit), you'll want to hold on to the mounting flanges that came with the unit; you'll put them on the UPS and then the flanges will screw to the front of the rails.

    After looking at how things would fit together, I realized I needed to put the rails on the bottom of the two rack units where I wanted to install the UPS (the UPS would sit on it) and then put in the top and bottom screw through the rails; the screw for the UPS would go through the middle screw hole.

    I have a NavePoint 12U wall mount rack (which I leave on the floor), which encourages (through the use of optional horizontal supports) to keep the front and back vertical rails to a maximum of 16.9 inches (430mm); however, these rails have a minimum length longer than that, so I had to take off the horizontal supports and move the vertical rails farther apart.

    Aside from the initial uncertainty on how to mount the UPS and the rail, it seems rather sturdy; I like that the rails themselves have screws in them for extra durability (although I know some people would rather not have screws).
    3 people found this helpful
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    Jern
    5.0 out of 5 stars This is the one you want even if you don’t know it yet.
    Reviewed in the United States on August 12, 2019
    Style: Rail KitVerified Purchase
    Built like a brick, straightforward to assemble, nice adjustable range, reasonably priced- what’s not to like?

    I’ve tried it all. And I come back to buy this one here.

    The cheaper off brand options don’t give me a lot of confidence and aren’t very sturdy- sure they might be ok for a 1U half-depth rinky-dink 4 disk NAS, but there’s no way I’m putting a 4U beast on the cheap mounts and risk catastrophe. Not worth it.

    (These will support a heavy 4U chassis just fine. I think their spec sheet says up to 3U, but as long as there aren’t 72 3.5” disks in there you’ll be fine)

    The sliding rails everyone gets excited about in my opinion become more trouble than they’re worth to get clearances just right and sometimes the server case doesn’t have a serviceable hatch in the right spot to make it useful anyhow. Most of my servers and arrays are self built and the tops which affix in the back and sides- won’t do you any good to have sliding rack mounts in this kind of scenario.

    So, that’s how these cyber power rails became my defacto standard. I can’t think of anything I want that these don’t have.
    18 people found this helpful
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    Greg S.
    5.0 out of 5 stars Strong and well-built rails, too bad they are not black
    Reviewed in the United States on September 25, 2022
    Style: Rail KitVerified Purchase
    They really hold all the weight that is being claimed. Fits my StarTech 42U open-frame rack just fine, with no alignment issues for the rack's holes. Comes with cage nuts and the associated screws. I knew that when I was buying the item, but I wish that the rails were black.
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    iNDy
    5.0 out of 5 stars No problems so far
    Reviewed in the United States on July 6, 2020
    Style: Rail KitVerified Purchase
    I ordered this rail kit for repurposing a Sophos SG 310v1 firewall I bought. The 310v1 came with only rack ears, no rack support in case the ears had a problem.

    Installation wasn't much of a problem. Sizing the rails to my rack had to be done first before locking the spacing down. The 3 adjustment screws made it easy to lock the size into space. The rails had to be screwed into the outside of the mounting edge, not the inside like other kits. Once mounted, I had to shimmy my firewall into place (past the rack ears) and screw it in. So far, I haven't had any problems. If it stays that way, I might order another set to replace a thinner rail kit for another device.
    2 people found this helpful
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    P. Chandler
    4.0 out of 5 stars Exactly 29" Fully Extended
    Reviewed in the United States on November 29, 2023
    Style: Rail KitVerified Purchase
    My rack posts were 29" and because the rails only extend to 29", I had to mount the backside of the rails to the inner side of the rear posts. No big deal but if they extended just a tad more than 29", would be 5 stars.
    Would buy again.
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    Pastreh
    5.0 out of 5 stars Perfect fit for the Silverstone RM42-502.
    Reviewed in the United States on February 13, 2023
    Style: Rail KitVerified Purchase
    I'm using these to hold my RM42-502 in a rack instead of the rail kit for that box. It wasn't very good and I got tired of picking up ball bearings off the floor every time I slid it in and out. These work perfectly.
    2 people found this helpful
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    Alex
    1.0 out of 5 stars Horrendous listing & hardware manufacturing
    Reviewed in the United States on January 26, 2024
    Style: Rail KitVerified Purchase
    It starts with the fact there is 0 documentation in the box. Not too worried, seems pretty straight forward..

    ..until I realized almost all of the rails (minus one whole rail!) were practically drilled together, so I just could not back the screws out to adjust them. On top of that;
    - they seem to get SUPER dinged up scarily easily
    - they are not at ALL sturdy. The one I was able to get installed properly flexes super easily under minimal weight no matter what

    Oh, probably should end with the fact (though probably already told by the images) these aren't actually really rails. These are just glorified shelves pretty much. Which I'd be totally fine with.. had the product actually worked in the first place.
    Helpful
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    Top reviews from other countries

    Nathan G.
    5.0 out of 5 stars Not flashy; very functional
    Reviewed in Canada on February 29, 2024
    Style: Rail KitVerified Purchase
    I have 2 sets of these, soon to be 3 in my rack. They aren't anything special, but they are solid. Some reviews mention the price of them being on the high side, but one thing to keep in mind it is sometimes even harder and more expensive to find rails of any kind. I have my media server sitting on these, I installed 3 rack nuts onto each side for piece of mind for the weight and they are solid. I have every confidence that they are able to hold every pound of the claimed 231 lbs. All in all, very happy!
    Report
    Garrick Padfoot
    5.0 out of 5 stars Very sturdy
    Reviewed in Canada on February 9, 2024
    Style: Rail KitVerified Purchase
    It's very sturdy. I was terrified with my heavy server with all the boxes of spinning iron that it would be in danger. It's not. It's very heavy steel, and comes together very strong.

    The instructions were a little unclear; but it's easy enough to figure out.
    Report
    JDM
    5.0 out of 5 stars Exactly as shown.
    Reviewed in Canada on December 12, 2022
    Style: Rail KitVerified Purchase
    Came with everything shown in the image. Nice sturdy universal rails allow you to place anything rack width on top of them.
    Report
    M.B.
    4.0 out of 5 stars May Not Fit
    Reviewed in Canada on November 17, 2022
    Style: Rail KitVerified Purchase
    As mentioned in other reviews, if your rack is full size at 29" then these will not fit and will require modifications to allow them to open up about an 1/8" more. Easy to do if you have the tools, took me seconds. If you don't have the tools they just won't fit.

    Other than that they are thick and strong.
    One person found this helpful
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    Bill Starling
    1.0 out of 5 stars These are not a standard rack mount size.
    Reviewed in Canada on April 10, 2024
    Style: Rail KitVerified Purchase
    These didn't fit my rack mount.
    Report