Twin Air 156063p Dual Foam Air Filter Fits: Bombardier/Can-Am Commander 800/1000 11-13 Twin Air filter's design, high quality materials and superior construction deliver unbeatable performance and protection, designed to increase airflow while ensuring the highest level of protection from dirt/dust Dual foam design: Coarse open-pore foam catches airborne dirt, grime and sand, fine open-pore inner foam acts as a second filter to trap the smallest particles while ensuring maximum air passage Thick, flat foam, greaseless sealing ring ensures maximum contact with your air box, while acting as a breathable gasket for increased air passage Comes with plastic filter base and square foam filter