Product Info: - Part: Drive Belt Tensioner Assembly - Material: Steel - Belt Type: Serpentine - Mount Hole Quantity: 3 - Pulley Center Bore Diameter: 0.669 inches - Pulley Center Bore Diameter: 17.00 millimeters - Pulley Outside Diameter: 3.0 inches - Pulley Outside Diameter: 76.5 millimeters - Pulley Width: 1.476 inches - Pulley Width: 37.