Double Roller Bearing Pillow Block DPB-10-OPN 5/8" IDDouble Roller Bearing Pillow Block (DPB) for a 5 8" diameter linear shaft in an open bearing style that features two sets of 3 opposing roller bearings while maintaining the standard size 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)