High density marine-grade stainless steel ensures strength and prevents crevice corrosion. Features a stainless steel drip collar that prevents staining of hull and a integrated ground screw on nut. Includes a durable stainless steel flapper to keep water from seeping into the exhaust system and a watertight gasket.

Measurements: A=51.3mm B=16mm C=57mm D=77mm E(Max)=32mm E(Min)=5mm.