American Biltrite S97 B4 000 Black 12" x 18" Virgin Rubber Truck Plain Flap - Pair The most durable guard on the market composed of a premium virgin rubber compound Molded rubber flaps resist chipping, cracking, tearing, and curling Formulated to withstand severe temperature changes and the most rigorous heavy duty highway conditions Available in various sizes with predrilled reinforced holes for easy installation Sold in pairs