Roller Assembly, Sliding, Zinc, Gray, Unfinished Finish, Length (In.) 2 13/16 in, Height (In.) 1 3/4 in, Width (In.) 9/16 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, Number of Wheels 0, Zinc, Hardware Included, Requires Hardware, For Use With Patio Door