A comprehensive range of plain and ball bearing sheaves is used throughout the complete Barton block range. Barton Plain Sheave 64 X 18 X 13 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: 52 gDimensions: 64 64 18 mmColour: Grey, WhiteSheave Size: 64mm x 18mm (2 1/2 x 45/64)Bore Diameter: 13mm