Roller Bearing Steel Silver Galvanized Finish Shaft Length 4-3/8 in Length (In.) 4 1/8 in Height (In.) 1 13/16 in Width (In.) 1 13/16 in Depth (In.) 1 13/16 in Outside Dia 1 7/8 in Wheel Diameter 1 3/4 in Max Wheel Dia (In.) 1 7/8 in Roller Width/Dia (In.) No Roller Surface Mounting Mounting Hole Size (In.) 15/32 in Steel Bearings Number of Wheels 1 Steel Hardware Not Included Requires Hardware For Use With Sectional Garage Door 1 Pair