Features: * Heavy duty 10 Ball bearing steel rollers provide for extended operating life * Rollers feature a case hardened raceway for added durability * For most overhead sectional wood and steel garage doors * Designed for use on 2 inch track * Factory lubrication provides for years of carefree operation * Plain steel finish * 3-1/4 inch shaft length * 7/16 inch shaft diameter * 1-13/16 inch wheel diameter * 7/16 inch width What"s In The Box: * Stanley Hardware 730775 Heavy Duty Steel Garage Door Roller