With dense mesh filter, the ventilation hood can keep dust or other debris from entering to ensure air circulation indoor and outdoor. No cuts will be made to your hands during installation because the edges of this ventilation cover are smooth without burrs. High-quality stainless steel material makes the ventilation cover anti-rust and weather-resistant for long durability. There are 7 specifications for you to choose from. Ventilation cover can be installed in the outside wall of home, restaurant, market, office building, etc. Item Name: Stainless Steel Ventilation Cover Material: 304 Stainless Steel Color: Silver Applicable Place: Home/Restaurant/Market/Office Building Specifications: 70mm, 80mm, 100mm, 120mm, 150mm, 180mm, 200mm Features: Anti-Rust, Waterproof, No Deformation Size Details: 70mm Size: 14.2cm x 14.2cm x 3.5cm/5.59" x 5.59" x 1.38" (Approx.) 80mm Size: 14.2cm x 14.2cm x 3.6cm/5.59" x 5.59" x 1.42" (Approx.) 100mm, 120mm Size: 14.2cm x 14.2cm x 4.3cm/5.59" x 5.59" x 1.69" (Approx.) 150mm Size: 19.8cm x 19.8cm x 4.9cm/7.8" x 7.8" x 1.93" (Approx.) 180mm, 200mm Size: 21.6cm x 21.6cm x 5.8cm/8.5" x 8.5" x 2.28" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Stainless Steel Ventilation Cover