No more gauges and no more guessing! The revolutionary see-through propane tank is made of fiberglass composite materials that allows you to actually see how much fuel is left. And because it of it’s revolutionary design, it is 30% lighter than steel. The plastic casing and fiberglass composite cylinder materials will never rust or corrode. Plastic housing has handles for easy carrying. Perfect for gas grills, tailgating, RVs, boating, camping, patio heaters and lighting.