Carry two 6 gallon tanks to buy fuel. Handles on each end for easy transportation. Two 1-1/2" wide grooves for secure tie down eliminates shifting while in motion. Meets USCG/ABYC/EPA requirements. Designed for ease of use and versatiltiy. Compact design saves space onboard vessel. Stackable design replaces standard 12 gallon. Built-in 5% vapor volume expansion chamber. Low permeation fuel tank and cap.