These aluminum left front Sprint car rotors are machined from a billet plate for excellent balance, true rotation and flatness. The rugged construction of these rotors resists thermal distortion and the black anodized finish prevents corrosion. These rotors fit the most popular 3" x 5" midget front hubs. Left front, 12.19" x .375", Fits 3" x 5" front hubs, Billet aluminum