Grand General 99973 Dark Gray Plastic Side Window Vent Deflector for Kenworth Designed for Kenworth Model W900L, W900A, W900B, W900S, W903L of 1984 and later; Model T660, T170, T270 and T370 of 2007 and later; Model T800W of 2008 and later; Model T800 and T803 from 1987 to 2007 Custom designed for a precise fit Lets fresh air into the cab for natural air circulation helping driver staying alert, preventing window fog, and lowering the interior temperature Installation is simple and easy with heavy duty adhesive tape (included) Sold as a pair for both driver and passenger side