Rack Mounting Hardware26" 3-Section Ball-Bearing Sliding Rail kit for server cases.Compatible With the Following RackmountsThe Codegen Railkit is compatible with the following Rackmounts: 2U Rackmount 405mm Deep 2U Rackmount 600mm Deep 3U Rackmount 650mm Deep 4U Rackmount 500mm Deep 4U Rackmount 600mm Deep 4U Rackmount 600mm Deep 4U Rackmount 635mm Deep 4U 500 Rackmount CaseKey Features