Double Roller Bearing Pillow Block DPB-12-OPN-S 3/4" ID - 2 ScrapersDouble Roller Bearing Pillow Block (DPB) with scrapers on each end, for a 3 4" Diameter Shaft, which has two sets of 3 opposing roller bearings while maintaining the standard size open bearing 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 twice the size as if they were two SPBs fused together. Double the load