- Marine Boat 3” Exhaust Flapper Protector Valve
- Compounded rubber flapper valves stops water from entering the exhaust system.
- Constructed with weather resistant EPDM with U/V stabilizer.
- Includes 3" stainless steel clamp.
- Manufacturer: Sierra
- Part Number: 18-4456
- Also Known As: 184456, Mercury 34765A1, 34765A2