A comprehensive range of plain and ball bearing sheaves is used throughout the complete Barton block range. Barton Ball Sheave 70 X 18 X 6 is moulded from acetal resin. Our unique, super-low friction ball race system features Delrin balls running on a large diameter centre boss, which ensures an extremely low friction performance.SpecificationsWeight: 74 gDimensions: 72 72 19 mmColour: Grey, WhiteSheave Size: 72mm x 18mm (2 53/64 x 45/64)Bore Diameter: 6mm