Plastic Bearing POM R4 Glass Balls 1/4x5/8x0.196 inchPOM R4 Plastic Radial With Glass Bearing 1 4" x 5 8" x 0. 196" inch One Bearing POM R4 Plastic Radial With Glass Bearing, Bearing is Polymer Raceways with glass. the dimensions are 1 4" x 5 8" x 0. 196" inch. Item: POM R4 Bearing Type: Plastic Radial With Glass Bearing Material: POM (Polyoxymethylene) also know as Acetal Inner Diameter: 1 4" inch Outer Diameter: 5 8" inch Width: 0. 196" inch Size: 1 4" x 5 8" x 0. 196" mm Quantity: One Bearing