StarTech.com Server Rack Cabinet Shelves - StarTech.com CABSHELF, This black Standard Universal Server 19in Rack Cabinet Shelf from StarTech.com helps to organise your mission critical computer hardware and accessories by adding a fixed shelf with the capacity to hold up to 20kg.This rack shelf is constructed of sturdy, cold-rolled steel for long-term durability and is backed by a lifetime warranty. StarTech.com CABSHELF Black Standard Universal Server Rack Cabinet Shelf