1. 316 stainless steel material, precision casting, corrosion resistance, no rust, strong and durable. 2. The surface is treated with high-precision point solution polishing, with high precision, brightness and polishing degree, effective anti-rust and anti-corrosion, and long service life. 3. Easy and simple installation 4. Use: Yacht, RV vents 5. Specifications: 4 inches
