NCFC208-24 FYH Bearing Round Flange Cartidge Bearing Cylindrical bore (with Concentric Locking Collar) 1 1/2" Inner Diameter Bearing NCFC208-24 FYH Round Flange Cartidge Bearing, bearing is Cylindrical bore with Concentric Locking Collar, the Inner Diameter is 1 1/2" Inch.