The White Water B00-T3-CAP Marine Nylon Replacement Cap is built for use with standard 1-1/8 inch inner diameter tubing found on boat ladders, steps, and platform rails. This durable nylon cap is a practical solution for sealing off open tube ends, providing a finished look and protection from wear, moisture, and impact. Whether you're replacing a lost end cap or building a new frame, this product helps maintain the structure and appearance of your marine hardware. Molded from marine-grade white nylon, this tubing insert resists corrosion, UV damage, and saltwater exposure. The tight push-in fit keeps it in place without adhesives or tools, making it ideal for quick replacement or field repairs. Use it as a nylon ladder end cap, marine tubing end cap, or boat ladder replacement cap in a wide range of marine environments. This part is compatible with many styles of boat ladders and marine platform rails. It functions as a boat tubing insert, plastic replacement end cap, or nylon ladder plug on pontoon boats, fishing boats, sailboats, and deck platforms. It reduces rattle in tubing and prevents water or debris from entering exposed pipe ends, helping extend the life of your frame or hardware system. Each package includes one marine nylon cap sized for 1 1/8 inch ID tubing. It installs in seconds with no tools required. Whether you are outfitting a new system or maintaining existing marine hardware, this cap is a simple, effective, and affordable solution to keep your tubing sealed, supported, and ready for continued use.