35mm Bearing UCP207 Black Oxide Plated Insert + Pillow Block Cast Housing Mounted BearingUCP207 Black Oxide Plated Insert + Pillow Block Bearing Set Screw Type High Center Height 35mm Inner Diameter UCP207 Black Oxide Plated Insert Pillow Block Bearing, UCP207 is Set Screw Type High Center Height, Inner Diameter is 35mm. Black oxide has certain properties and characteristics that makes it ideal for certain applications. It is used to add corrosion resistance and for appearance.. UCP207 Bearing Pillow Block Mounted Bearing Bolt Size: 1 2"