R1810 Open 5/16 x 1/2 x 5/32" BearingR1810 Ball Bearing 5 16" x 1 2" x 5 32" inch One Bearing R1810 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 R1810 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 Bearing Dynamic load