The Attwood Twist-On Hose Flange is designed for use with standard three inch ventilation hose. The hose installs from the top by turning the flange into the hose spiral, passing the hose through the deck hole, and mounting the ventilator. The hose flange is made from black, corrosion-resistant polycarbonate and installs with 10 screws. No hose clamps are required for installation.
Size:
- 3-1/2″ diameter installation hole size
