Utilizing Low Permeation Tank Technology, Moeller fuel tanks are EPA low perm certified and conform to all ABYC, NMMA, and USCG regulations. The below-deck tanks utilize durable marine-grade, rotationally molded, cross-linked polyethylene plastic that's corrosion and pit resistant. Fill spouts, withdrawal, and vent fittings are molded directly into the shell. Machined aluminum 3/8" withdrawal fitting has 360° rotational capability for hook-up convenience. Starboard Side Tank capacity: 18 gallons. Dimensions: 8.25"W x 39"L x 17.75"D. Please note: Hydrocarbon swell causes tanks to expand by 3% in all directions. When measuring, please allow for this expansion as well as an extra 2-1/2" for fittings. Actual fill capacity can vary by +/- 5% of the printed capacity due to how the tank is installed in the boat and variances in the outside temperatures. Low Perm Certified 3/8" withdrawal fitting w/360° rotation capability Vent hose 5/8" & fuel fill hose 1-1/2" | Starboard Side Fuel Tank, 18 gal, 8.25"W x 39"L x 17.75"