4 Inch Heavy Gauge 304 Stainless Steel Flapper Automatic Open Exhaust Rain Cap

This 304 Stainless Steel Exhaust Rain Cap, also known as Muffler Rain Cap Flap, is a flapper-style weather protector for vertical exhaust stacks of diesel generators, trucks, tractors and other heavy machinery. Function: 1. Rain and snow prevention: park and close to prevent rainwater from entering the muffler and exhaust pipe, reducing internal water accumulation and corrosion;2. Preventing foreign objects from entering: blocking leaves, dust, and willow catkins to prevent