This marine gas cap is designed with ABS materials that ensure longevity and resistance to water, ensuring it withstands the harsh marine environment. Its multifunctional design makes it suitable for use on both oil and water tank covers, simplifying the process of adding fuel and water to your boat or RV. Installation is straightforward and does not require tools, allowing for quick and easy setup. This essential accessory not only improves the look of your boat but also its operational efficiency. Features -Color:Black -Material:ABS -Size:8.50X8.50X7.00cm/3.34X3.34X2.75in -Good construction: made with plastic materials, offering robust and waterproof features for extended use -Multipurpose use: designed for boat fuel and water tank covers, facilitating easy refueling and water replenishment -Quick setup: effortless installation process, requiring no tools, ensuring quick and easy setup -Ideal addition: provides an excellent accessory for boats and rvs, improving both aesthetics and functionality -Secure and reliable: provides a secure and reliable solution for protecting your belongings with its innovative waterproof sealing design Package list: 1 x hatch cover