Linear Pillow Block Bearing Inside Dia 1 1/2 in Material Aluminum Alloy Bearing Type Ball Body Width (In.) 3.5 in Bolt Size 0.25 in Color Silver Dimension a 4.75 in Dimension A2 3.5 in Dimension B 4 in Dimension E 2.5 in Dimension E1 4.125 in Dimension F 2.88 in Dimension F1 0.5 in