Smart. Trusted. Best-In-Class. Scepter Marine is your one-source solution for innovative fuel tank technology. We've revolutionized the marine industry standards for topside fuel tanks, providing engineered solutions that look and perform better than any other fuel tanks available. Scepter is the global leader in the design and manufacture of innovative and high-quality marine tanks like this 6 gallon under seat fuel tank. Made from UV stabilized multi-layer HDPE for maximum durability. Equipped with Scepter's 2 way vented cap; this automatic air inflow valve system allows air to enter tank during operation and pressure to be released above 5 PSI. Scepter tanks are built to last. Caution: Tank swelling will occur. EPA regulations have eliminated the traditional venting in these tanks. New portable outboard marine fuel tanks will not vent below 5 PSI with noticeable swelling. The new EPA compliant cap will cause the portable outboard marine fuel tanks to swell. The swelling is a result of the fuel vapor building pressure, because the cap must stay sealed up to 5 PSI. The new tanks have been tested to remain sealed and safe at these pressures even when swelling is visible. Certifications: EPA: 40 CFR 1060 Fed Emissions Regulation; ABYC H-25 (2016) – Portable Marine Gasoline Fuel Systems; ASTM 2517-17 Child Safety; 40 CFR 1500