This Dryer Exhaust Duct is constructed of snap-lock metal that is crush resistant and flexible. It features one male fitting and one female fitting for standard 4" exhaust openings. This exhaust duct is the best choice for quick and easy installation and for use as an extension with other vent ducts. This product is designed for use with several major brands; check to see if your model number is compatible. Installing this accessory will require no disassembly or repair experience. You must unplug the dryer or shut off the house circuit breaker for the appliance before installing.