Product Info: Brand: KarParts360 Part: Brake Discs Position: Rear Disc Material: Cast Iron Disc Finish: Natural Disc Design: Plain Surface Disc Construction: Vented Disc Diameter: 12.8 inches Number of Lugs: 6 Lugs Notes 0.79 inches nom. Thickness; 0.73 inches min. Thickness; 3.09 inches Hub Reg; 0.