ABS marine-grade construction for durable performance in saltwater, UV exposure, and varying weather. Ideal for long-term yacht and boat installations. Enhanced waterproof design with a thicker rubber gasket creates a superior water barrier. Effectively blocks water from inspection ports, protecting under-deck components from moisture and supporting overall safety and maintenance. Easy installation with a removable cover and housing that allows quick, tool-free setup. User-friendly design provides easy access to inspection areas when needed and secure sealing when not in use, saving maintenance time. Available in two practical sizes: 10.2 cm or 15.2 cm diameter to fit your specific deck opening requirements. Both sizes use the same high-quality construction and waterproofing, ensuring compatibility with standard inspection ports on most vessels and platforms. Use scenarios: - Install on deck inspection ports on yachts and boats for quick access during routine checks while maintaining a watertight seal. - Use in rough seas or after rain to keep moisture and saltwater away from sensitive under-deck equipment. - Service electrical or mechanical spaces by removing the cover when needed and resealing promptly for continued protection.