DUCTING KIT: 9-piece kit includes everything you'll need for replacing your exhaust fan's ducting DURABLE: Items are constructed with resin material for superior impact and UV resistance ADAPTER INCLUDED: Features a 3" to 4" duct adapter for easy installation FLEXIBLE DUCTING: 5-foot of 4-inch diameter flexible foil ducting for easy installation DECORATIVE WALL CAP: White wall cap for 4" round duct includes 4 mounting screws to help install an attractive piece