675042-001Rack mounting rail kit - For 1U server models with Small Form Factor (SFF) drives - Includes left and right telescoping ball bearing type slide rails
744111-001Rack mounting easy install kit 1U - For 1U server models with Small Form Factor (SFF) drives - Includes left and right friction type slide rails
744112-001Rack mounting easy install kit 1U - For 1U server models with Large Form Factor (LFF) drives - Includes left and right friction type slide rails