Covered Box Rail, Material Steel, Galvanized Finish, Length 120 In, Height 5 1/2 In, Width 3 3/8 In Item Covered Box Rail TrackType Sliding DoorMax. Weight (Lb.) 450Material SteelFinish GalvanizedLength (In.) 120Height (In.) 5-1/2Width (In.) 3-3/8Construction SteelHardware Not IncludedFor Use With Doors Weighing Up To 450 PoundsPackage Quantity 1 Covered Box Rail Steel