Double Roller Pillow Block DPB-20-OPN 1.25" ID - Standard WidthDouble Roller Bearing Pillow Block (DPB) for a 1 25" diameter linear shaft features two sets of 3 opposing roller bearings while maintaining the standard size open bearing style profile of a Single Roller Pillow Block (SPB). In contrast, a Twin Roller Pillow Block (TWN) also has two sets of 3 opposing roller bearings, but the TWN blocks are larger, resembling two SPBs fused together. Double the load capacity of a Single Roller Bearing (SPB) Pillow