Linear Pillow Block Bearing Inside Dia 3/4 in Material Aluminum Alloy Bearing Type Ball Body Width (In.) 1.88 in Bolt Size - Color Silver Dimension a 2.75 in Dimension A2 1.88 in Dimension A (In.) - Dimension B 4.5 in Dimension B (In.) - Dimension C - Dimension C (In.) - Dimension D (In.) - Dimension E 3.5 in Dimension E1 2.375 in Dimension E (In.) - Dimension F 1.56 in Dimension F1 0.31 in