StarTech.com UNIRAILS1UB is an adjustable rail pair for fitting servers and networking equipment into a 1U, 19-inch, four-post rack. It can support equipment that did not come with its own rails, helping make it rack-mountable.
The mounting depth adjusts from 24 to 36 inches (61 to 91.4 cm) to suit different rack depths. The cold-rolled steel rails have a stated load capacity of up to 200 lb (90.7 kg). StarTech.com specifies compatibility with most 19-inch server racks compliant with EIA/ECA-310.
In the box: two rails, 8 M6-12 screws, 8 M6 cage nuts, 8 M6 plastic cup washers, and a quick-start guide.