7/8" Inch Flanged Ball Bearing with 3/8" diameter integrated 3/8" Inch (9.53mm) Pin Diameter 3/8" x 7/8" x 1 1/4" Inch 7/8" inch (22.23mm) Flanged Ball Bearing with 3/8" inch (9.53mm) diameter integrated 1 1/4" inch (25.4mm) Long Axle, Pin Diameter is 3/8" inch, Bearing Outer diameter is 7/8" Inch (22.23mm), and Width of the assembly is 1 1/4" Inch (31.75mm Long), Bearing is made of Chrome Steel.