Designed to support most servers in a rack or cabinet. Fits any rack and cabinet including 19", 23", 30". Product Size: H 1.87" (1U Space) x W 2.70" x D 15"-24"(380-610 mm), Depth Adjustable from 15 Inch to 24 Inch, you can accommodate various rack sizes. Made of high quality cold rolled steel with powder coating, Support up to 110 lbs when installed to a 4 post rack or cabinet at 15 Inch Deep. Including 1 Pair of 1U Server Shelf Rails, 8 sets of M6 screws and cage nuts. Easy Installation: Including all the screws for assembly and installation.