Bridge filler with keyless design and durable stainless steel construction Hose outer diameter: 1.5 inches (38 mm) material and finish: Marine grade stainless steel with a hand mirrorpolished surface for a smooth, attractive appearance. Recessed flush with the deck to deliver a contemporary look and a clean installation. Practical design: Keyless filling cap for easy operation. Open or close the cap quickly and conveniently. The cap is attached to the body with a stainless steel retaining chain to prevent loss or misplacing the cap. Wide compatibility and applications: Suitable as a deck filler accessory for kayak, canoe, marine boat, fishing dinghy, caravans, RVs, vans, trucks, tractors and more. Use scenarios: On a kayak or canoe deck, install this bridge filler to provide a neat, flushfill port for water tanks or other onboard reservoirs. On a small boat or dinghy, a worn or loose filler cap with this durable, chainattached cap to reduce cap loss during use. On caravans, RVs, vans, trucks, or tractors, install as a robust external deckfill for water or auxiliary tanks, combining durability with a polished, integrated look.