Bee Valve Inc.'s new, 4-inch heavy-duty 404 Series nylon couplers/adapters have a heavier wall construction than the standard for greater strength. All 404 Series couplers come standard with four stainless steel handles for a more secure connection in higher-pressure applications. The fittings are constructed in glass-reinforced nylon for light weight with the strength to resist cross threading, thread seizure and "out-of-round" condition. The non-conducting nylon fittings are chemical resistant to most acids and are interchangeable with other couplers and adapters manufactured to MIL-spec.