Product Description IS6 Volt Type Disc Brake Rotors Product Details: Material: Stainless steel; Size O: 5.5 inches (140 mm); Weight: 4.5 oz (115 g); PCD: 1.7 inches (44 mm); 0.07 inches (1.8 mm); 6 bolt type; Includes 6 mounting bolts. Manufacturer Part Number: YBR04300.