The Sierra 18-4458 Exhaust Protector Valve is interchangeable with the following: GLM 89260, Mallory 9-44002. Includes stainless steel clamp. Comes in a size of 5 in. and 6 in. or 127 mm and 152.4mm. Compounded rubber flapper valves prevent water from entering the exhaust system. Made with weather resistant EPDM with UV stabilizer.
