Double Roller Pillow Block Bearing DPB-32-OPN-TG for a 2" Shaft, Top Grease Lubrication PortDouble Roller Pillow Block Bearing (DPB) for a 2" Diameter Shaft with a lubrication port. The open bearing style block has two sets of 3 opposing roller bearings while maintaining the standard size profile of a Single Roller Pillow Block (SPB); thus the term "Double." By contrast, a Twin Roller Pillow Block (TWN) also has two sets of 3 opposing roller bearings, but the TWN blocks are double sized as if they were two SPBs fused together. Double the