Plain Bearing Sheave - 35mm (1-3/8")A comprehensive range of plain and ball bearing sheaves as used throughout the complete Barton block range.Moulded from Acetal resin, our unique, super-low friction ball race system features Delrin balls running on a large diameter center boss, which ensures an extremely low friction performance.Specifications:Diameter: 35mm (1 3/8 in)Height: 12mm (15/32)Bore: 8mm (5/16)