Product Specifications: Condition New Bearing Bore Inside Diameter (IN) 0.67 Bearing Bore Inside Diameter (MM) 17 Belt Type V-Ribbed Contact Surface Smooth/Backside Material Thermoplastic Mounting Hole Quantity 1 Outside Diameter 1 (IN) 2.76 Outside Diameter 1 (MM) 70 Pulley Quantity 1 Width 1 (in) 1 Width 1 (mm) 25.5 About This Item: .