- Made of #304 Stainless Steel- Male part of adapter is tapered for easy connection of female and male parts.- Female part is also tapered for tight connection and easy removal.- Replaceable O-ring seal in solid casting.- Molded gasket for positive outside seal on discharge, plus O-ring or gasket glued in place, for seal on inside of casing.- Solid collar made for perfect fit and positive seal between molded gasket to discharge and outside of casing.- Extra-wide solid nut to accommodate wrench for easier installation.