15mm Bearing UCFL202 Black Oxide Plated Insert + 2-Bolt Flanged Cast Housing Mounted BearingUCFL202 Black Oxide Insert Mounted Bearing 15mm Inner Diameter One Bearing 15mm Mounted Bearing UCFL202 with Black Oxide Plated Insert, measures an inner diameter of 15mm. Black oxide has certain properties and characteristics that makes it ideal for certain applications. It is used to add corrosion resistance and for appearance UCFL202 Black Oxide Plated Insert + 2 Bolts Flanged Cast Housing Mounted Bearing Mounted Bearings Bolt Size: M10 Basic Load