R1804 Rain Cap, 2-3/4" - Fits Case Misc ModelsOne New Aftermarket Replacement Rain Cap for Case, Minneapolis Moline, Massey Ferguson, Deutz and More This 2 3 4" exhaust rain cap mounts on the top of a vertical exhaust stack to prevent rain, snow, and debris from entering the exhaust pipe. A spring loaded or gravity hinged flap opens under exhaust pressure and closes when the engine is off, protecting the muffler and exhaust system on tractors and industrial equipment. This is a universal fit cap