Round marine inspection hatch made of 316 stainless steel, 106 mm, with removable cover and watertight seal

⚓ General Description This 4-inch round marine inspection porthole made of 316 stainless steel is designed for demanding professionals and enthusiasts. Robust, watertight, and non-slip, it ensures a perfect seal on boats, yachts, vessels, or camper vans. Ideal for quick access to technical compartments—without compromising on safety or durability. 📐 Technical Specifications Inner Diameter: 106 mm (4.2 in) Outer Diameter: 140 mm (5.5 in) Material: Marine grade 316 stainless steel + rubber O-ring Finish: High-precision mirror polishing Watertightness: Integrated O-ring for optimal water protection Mounting: Screws not included (standard drilling) 🔧 Installation Quick and intuitive installation—no technical skills required. The detachable cover is easily secured with standard screws. No special or professional tools required: you can install it in minutes. ⛵ Use: Perfect for regular inspections, maintenance, or accessing below-deck circuits. Its non-slip coating ensures a firm grip, even when wet. Used on yachts, fishing boats, commercial vessels, or campervans—anywhere marine reliability matters. ℹ️ Other information: Designed specifically for demanding saline environments. Resistant to oxidation, UV rays, and minor impacts. Comes with 1 complete hatch (cover + body + gasket). Compatible with all flat surfaces requiring secure, watertight access.