3/4" Inch Ball Bearing with 3/8" diameter integrated 3/8" Inch (9.53mm) Pin Diameter 3/8" x 7/8" x 1" Inch 7/8" inch (22.23mm) Ball Bearing with 3/8" inch (9.53mm) diameter integrated 1" inch (25.4mm) Long Axle, Bearing is made of Chrome Steel, Pin Diameter is 3/8" inch, Bearing Outer diameter is 7/8" Inch (22.23mm), and Width of the assembly is 1" Inch (25.4mm Long).