Double Roller Pillow Block DPB-20-OPN-SCP for a 1.25" Shaft, Scrapers, Chrome PlatedChrome Plated Double Roller Bearing Pillow Block (DPB), with scrapers, for a 1. 25" 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 double sized as if they were two SPBs fused together. Double the