25mm Bearing UCFL205 Black Oxide Plated Insert + 2-Bolt Flanged Cast Housing Mounted Bearing25mm Black Oxide Plated Insert Mounted Bearing UCFL205 One Bearing 25mm Black Oxide Plated Insert Mounted Bearing UCFL205, measures an inner diameter of 25mm. lack oxide has certain properties and characteristics that makes it ideal for certain applications. It is used to add corrosion resistance and for appearance UCFL205 Black Oxide Plated Insert Bearing + 2 Bolts Flanged Housing Mounted Bearings Bolt Size: M10 Basic Load (Cr): 14,000 N Basic Load