45mm Bearing UCP209 Black Oxide Plated Insert + Pillow Block Cast Housing Mounted BearingsUCP209 Black Oxide Plated Insert Pillow Block Bearing Set Screw Type High Center Height 45mm Inner Diameter UCP209 Black Oxide Plated Insert Pillow Block Bearing, UCP209 is Set Screw Type High Center Height, Inner Diameter is 45mm. Black oxide has certain properties and characteristics that makes it ideal for certain applications. It is used to add corrosion resistance and for appearance. Item: UCP209 Black Oxide Plated Insert Bearing + Pillow block