1. ABS CONSTRUCTION: These marine drain valves are crafted from grade ABS plastic material, offering exceptional durability and long lasting performance even in harsh marine environments. The sturdy construction makes these scupper valves resistant to impacts and UV damage, making them a reliable addition to your watercraft. 2. EFFECTIVE WATER MANAGEMENT: Designed with a plastic cover featuring an integrated check valve and rubber pad, these self bailing valves effectively prevent water backflow while keeping your cabin dry. The one way design allows water to drain out while blocking unwanted water from entering, maintaining a comfortable and dry interior space. 3. EASY INSTALLATION: Simply secure with screws for a quick and hassle installation process. These scupper valves are designed for straightforward mounting, requiring minimal tools and technical knowledge. Each valve measures approximately Ø71.3mm*8.4mm, providing a standard fit for most applications. 4. VERSATILE APPLICATIONS: suited for various watercraft including ships, yachts, and recreational vehicles. These check valves are essential components for any water vessel where managing water flow and maintaining dry conditions are priorities, enhancing both comfort and safety during your water adventures.