Not only is the polymer reservoir lightweight, but it’s also rustproof. It has a 55 gallon capacity and is ideal for situations where weight is a factor. Features dual 2″ NPT ports and level/temperature sight gauge. Also includes a 2 x 1-1/4″ screw-in diffuser and a chain-mounted 40 micron filler breather cap. Constructed from reinforced, high-density polyethylene. Complete with strapless hold-down system.