Bracket End Cap Box Rail Sliding Door Box Rail Steel - Galvanized Finish Length (In.) 2 1/4 in Height (In.) 1 3/16 in Width (In.) 1 3/4 in Depth (In.) - Max Wheel Dia (In.) - Roller Width/Dia (In.) No Roller - Mounting Mounting Hole Size (In.) - - Bearings Steel Hardware Not Included Requires - For Use With Box Rail Tracks