RI-8516 Open 5/16 x 1/2 x 5/32" BearingRI 8516 Chrome Steel Ball Bearing 5 16" x 1 2" x 5 32" inch One Bearing RI 8516 open Ball Bearing, made from durable 52100 alloy steel, commonly known as chrome steel, inner diameter is 5 16" inch, outer diameter is 1 2" inch and width is 5 32" inch RI 8516 Ball Bearing Deep Groove Ball Bearing Material: Chrome Steel Closures: Open Inner Diameter: 5 16" inch Outer Diameter: 1 2" inch Width: 5 32" inch Size: 5 16" x 1 2" x 5 32" inch Quantity: 1