Oregon 45-085 Bushing With Inner Diameter Of 1/2-Inch Outer Diameter Of 3/4-Inch Width Of 5/8-Inch Replaces MTD part numbers 748-0108 and 948-0108 Impeller shaft bearing on 610, 612, 640, 642 and 660 snowblowers Inner diameter of 1/2-inch Outer diameter of 3/4-inch Width of 5/8-inches