Description Large Air Pressure Tank 9-3/8L X 2-5/8 Diameter Overview This is the largest air tank available, and a replacement for plastic soda bottles that are sometimes used. This is the perfect air tank for giant scale retract systems. Constructed from aluminum with a steel cap, this air tank is safe for air pressures to 150 psi. Air capacity is 43 cu. in. (704.8cu. cm.) Approximate Size: 9 3/8″ L X 2 5/8″ Dia.