This Faber 27 cu ft Steel tank has approximately the same footprint as our 20 cu ft. aluminum cylinder and fits perfectly on the Rapid Diver system. Specifications: Specifications 2400 psi + (2640 psi) (180 bar) 27 cubic foot – 4 Liter 14.43” Height 5.45” Diameter 11.66 Lbs total weight Negative 3 lbs full Negative 1 lb empty