Double Roller Pillow Block Bearing DPB-20-OPN-SCPTG 1.25" ID - 2 Scrapers, Lubrication Port, Chrome PlatedChrome Plated Double Roller Bearing Pillow Block (DPB), with scrapers and a grease port for a 1. 25" Diameter Shaft. A double pillow block has and open bearing style and 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 twice the size as if