Pillow Block Bearing, Number of Bolts: 2, Ball Bearing Type, 1/2 in Bore Dia./ BORE DIAMETER: 0.5000 INCHES NOMINAL HOUSING HEIGHT: 1.875 INCHES NOMINAL HOUSING WIDTH: 4.187 INCHES NOMINAL ALIGNMENT TYPE: SELF-ALIGNING SPECIAL FEATURES: BASE MOUNT; RUSTPROOF PLATED FINISH; LIGHT DUTY; BASE TO SHAFT CENTER 15/16 IN.; MOUNTING ON CENTER 3 3/16 IN.; HOLE DIA 7/16 IN. MATERIAL: STEEL HOUSING MATERIAL: RUBBER INNER LINER STYLE DESIGNATOR: A26 PILLOW BLOCK, SEPARABLE WITH INNERLINER