Roller Assembly, Roller, Steel, Gray, Unfinished Finish, Length (In.) 3 in, Height (In.) 3/4 in, Width (In.) 1 1/2 in, Outside Dia. 1 1/4 in, Max. Wheel Dia. (In.) 1 1/4 in, Roller Width/Dia. (In.) 1-1/4 in, Door Mounting, Steel Bearings, Steel, Requires Hardware, For Use With Patio Glass Door