Double Roller Pillow Block Bearing DPB-48-OPN for a 3" ShaftDouble Roller Bearing Pillow Block (DPB) for a 3" 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 Block