Due to the thickened material, the ventilation cover resists deformation and features a secure snap connection to reinforce stability and prevent dislodging. The hemispherical design and large air outlet reduce airflow resistance, providing effective ventilation and exhaust performance. The bottom includes dense filters and 45-degree inclined stainless steel louvers that help keep dust and debris out. Made from premium 201 stainless steel, the air vent cover is rust-resistant and built for long-term durability. Available in 9 sizes with punching diameters of 50mm, 60mm, 80mm, 100mm, 120mm, 150mm, 160mm, 180mm, and 200mm. Suitable for installation in exterior walls of homes, restaurants, markets, office buildings, and similar environments. Item Name: Ventilation Cover Material: 201 Stainless Steel Color: Silver Applicable Place: Home, Restaurant, Market, Office Specifications: Punching Diameter: 50mm, 60mm, 80mm, 100mm, 120mm, 150mm, 160mm, 180mm, 200mm Features: Waterproof, Glossy Surface, Thickened Size Details: Punching Diameter: 50mm (1.97"), 60mm (2.36"), 80mm (3.15"), 100mm (3.94"), 120mm (4.72"), 150mm (5.91"), 160mm (6.3"), 180mm (7.09"), 200mm (7.87") (Approx.) Mounting Depth: 50mm, 60mm, 100mm: 40mm (1.57"), 80mm: 35mm (1.38"), 120mm, 150mm: 48mm (1.89"), 160mm: 55mm (2.17"), 180mm, 200mm: 60mm (2.36") (Approx.) 50mm, 60mm Size: 12.5cm x 12.5cm x 10.3cm (4.92" x 4.92" x 4.06") (Approx.) 70mm, 80mm Size: 12.5cm x 12.5cm x 10cm (4.92" x 4.92" x 3.94") (Approx.) 100mm Size: 14.5cm x 14.5cm x 11.3cm (5.71" x 5.71" x 4.45") (Approx.) 120mm Size: 14.5cm x 14.5cm x 12cm (5.71" x 5.71" x 4.72") (Approx.) 150mm Size: 18.5cm x 18.5cm x 14cm (7.28" x 7.28" x 5.51") (Approx.) 160mm Size: 19cm x 19cm x 15cm (7.48" x 7.48" x 5.91") (Approx.) 180mm Size: 22cm x 22cm x 17cm (8.66" x 8.66" x 6.69") (Approx.) 200mm Size: 22.5cm x 22.5cm x 17.3cm (8.86" x 8.86" x 6.81") (Approx.) Notes: The edge of the stainless steel vent is sharp; handle with care. Wear gloves during installation. Keep out of reach of children. Due to lighting and screen settings, the actual color may vary slightly from images. Slight dimensional variations may occur due to manual measurement. Package Includes: 1 x Stainless Steel Ventilation Cover