Jet intake protector , attaches to trailer bunks directly below your drive intake to help guard against dust, grit and road grime being injested onto your jet drive while towing over the road .We have had these for years but not marketed them , they once manufactured by a Socal canvas shop, we have elected to bring these back , now made from the same durable material used on Semi-truck tarpaulins , these hand made Jet protectors come with hardware neccesary to attach to your boat trailer's wood bunks $24.95 (black only)