By purchasing this product
NBR backing for grip and durability
Slotted Shim Type Tabbed Shim Material Stainless Steel Grade 302/304 Number of Pieces 260 Thickness Tolerance +0
they're lighter in weight with a hollow center and don't need a precise hole
PBC Linear DPB-24-OPN Double Roller Pillow Block, For 1 1/2 in Round Shaft, 3,320 lbf Dynamic Load Rating 40GL57 By purchasing this productDouble Roller Pillow Block, System of Measurement Inch, For Shaft Diameter 1 1 2 in, Overall Length 3. 75 in, Overall Width 4. 75 in, Overall Height 2. 875 in, Center Height 1. 75 in, Dynamic Load Rating 3,320 lbf, Carriage Type Double, Mount Hole Center to Center Width 4. 125 in, Mount Hole Center to Center Length 2. 5 in, For Shaft Type Round, Mounting Hole Diameter 0. 28125 in, Shaft Center to Mount Hole Width 1. 875 in, Bearing Material Aluminum