Linear Pillow Block Bearing Inside Dia 1/2 in Material Aluminum Alloy Bearing Type Ball Body Width (In.) 1.38 in Color Silver Dimension a 2 in Dimension A2 1.38 in Dimension B 3.5 in Dimension E 2.5 in Dimension E1 1.688 in Dimension F 1.13 in Dimension F1 0.25 in