Door Roller, 4 1/2 In, Dia. 2 In, PK4 Price For: Each Number of Wheels: 1 Item: Garage Door Roller Material: Steel Max. Wheel Dia. (In.): 1-7/8 Construction: Steel Type: Short Stem Finish: Mill Shaft Length: 4-1/2" Roller Width/Dia. (In.): 2 Bearings: Steel 10 Ball Country of Origin (subject to change): China