Parameters: 2 air inlets, 1 air outlet, including interface length 28cm, length 24.5cm, height 24.5cm, width 17.5cm, diameter of the air outlet 10cm, diameter of the air inlet 7.5cm。 Material: Selected high-quality profiles, crafted with many surprises, simple and extraordinary appearance, smooth and neat paint surface, moisture-proof and fire-resistant, not easy to rust.Double exhaust port: dual air outlet, faster exhaust speed, make the indoor air more fresh, non-equidistant blade design, strong wind, low sound, 360 ° cycle ventilation, give you a quiet and comfortable indoor space.High-efficiency ventilation : Metal wind wheels are preferred. Each blade is designed to be unequal, providing rapid air supply and fresh ventilation.Use scene: It is widely used in the supply and exhaust of places such as hotels, guesthouses, conference rooms, tea houses, coffee shops, office buildings, shopping malls, supermarkets, stations, airports, bars and other places.