Double Roller Pillow Block Bearing DPB-24-OPN-SCPTG for a 1.50" Shaft, Scrapers, Top Grease, Chrome PlatedChrome Plated Double Roller Pillow Block Bearing (DPB) for a 1. 5" Diameter Shaft, chrome plated with a scraper on each end and a top grease lubrication port. The double pillow block 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