Exquisite and high-quality workmanship provides rust-resistant and corrosion-resistant properties. The hemispherical design helps reduce resistance for improved efficiency. The 45-degree inclined louvers help prevent rainwater ingress. The fixed buckle design enhances stability and helps prevent dislodging. Made of 304 stainless steel, it offers durable performance. Available in nine sizes: 50mm, 60mm, 80mm, 100mm, 120mm, 150mm, 160mm, 180mm, and 200mm. Suitable for residential, commercial, and office building applications, including homes, restaurants, supermarkets, and offices. Item Name: Stainless Steel Vent Outlet Material: 304 Stainless Steel Color: Silver Features: Fixed Buckle, Rust-Resistant, Non-slip Size Details: 50mm: Length: 12.5cm/4.92", Width: 12.5cm/4.92", Height: 10.3cm/4.06", Punch Diameter: 5cm/1.97", Installation Depth: 4cm/1.57" (Approx.) 60mm: Length: 12.5cm/4.92", Width: 12.5cm/4.92", Height: 10.3cm/4.06", Punch Diameter: 6cm/2.36", Installation Depth: 4cm/1.57" (Approx.) 80mm: Length: 12.5cm/4.92", Width: 12.5cm/4.92", Height: 10cm/3.94", Punch Diameter: 8cm/3.15", Installation Depth: 3.5cm/1.38" (Approx.) 100mm: Length: 14.5cm/5.71", Width: 14.5cm/5.71", Height: 11.3cm/4.45", Punch Diameter: 10cm/3.94", Installation Depth: 4cm/1.57" (Approx.) 120mm: Length: 14.5cm/5.71", Width: 14.5cm/5.71", Height: 12cm/4.72", Punch Diameter: 12cm/4.72", Installation Depth: 4.8cm/1.89" (Approx.) 150mm: Length: 18.5cm/7.28", Width: 18.5cm/7.28", Height: 14cm/5.51", Punch Diameter: 15cm/5.91", Installation Depth: 4.8cm/1.89" (Approx.) 160mm: Length: 19cm/7.48", Width: 19cm/7.48", Height: 15cm/5.91", Punch Diameter: 16cm/6.3", Installation Depth: 5.5cm/2.17" (Approx.) 180mm: Length: 22cm/8.66", Width: 22cm/8.66", Height: 17cm/6.69", Punch Diameter: 18cm/7.09", Installation Depth: 6cm/2.36" (Approx.) 200mm: Length: 22.5cm/8.86", Width: 22.5cm/8.86", Height: 17.3cm/6.81", Punch Diameter: 20cm/7.87", Installation Depth: 6cm/2.36" (Approx.) Notes: Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Please allow slight variations in dimensions due to manual measurement. The edges of the stainless steel vent are sharp; handle with care. Wear gloves during installation. Keep out of reach of children. Package Includes: 1 x Stainless Steel Vent Outlet