Features: 1.Wide Application: Boat diesel deck filler is suitable for 50mm (2in) diameter fuel hose, fit for boats, yachts, caravans, campers, RVs, trucks, tractors. 2.Keyless Design: Boat fuel filler is easy to use, you just lift the tab on the cap and turn it to open or close, convenient design with screw mounting and splash lip. 3.High Quality Accessories: Equipped with a stainless steel retaining chain to avoid loss or misplacement of the cap, the lid contains a premium O ring seal for a good seal. 4.Premium Material: Boat deck filler is made of 316 stainless steel, it has strong rust resistance and can be used in acid, alkali and humid environments. 5.Durable: High quality and durable boat deck gas filler, antirust and wear resistant, can be used for a long time, good reliability, nice choice for you. Specification: Item Type: Boat Diesel Deck Filler Material: 316 Stainless Steel Surface Treatment: Mirror polished, beautiful and clean, easy to clean Hole Size: 50mm (2in) Applicable Fuel Hose Size: Fits 50mm (2in) diameter fuel hose Details: Lift the built in tab on the cap and turn to open or close. Comes with a stainless steel retaining chain to avoid loss or misplacement of the cover Application: Wide range of applications, suitable for boats, yachts, caravans, campers, RVs, trucks, tractors