Material: Made of high quality material resistant to external factors (weather and aging resistant stainless steel). Simple design: Smooth surface, low air resistance.< /p> Installation: Suitable for wall mounting and duct mounting. Application: As air inlet and outlet, installed in indoor ventilation equipment. < p>Function: Fresh air ventilation inlet and outlet system. Flange connector High quality metal material, stainless; heat. Easy installation for wall or ceiling in the house. Application in homes, basements, garages, offices and much more. Various uses Use for heating and ventilation systems.Use it to connect your channel pipe to an outlet. Use the exhaust duct from your clothes dryer, bathroom or kitchen and many other indoor and outdoor ventilation systems. Size: 100mm Quantity delivered: 1 piece