Boss Manufactures lightweight T6 heat treated aluminium air tanks, with a range of tank sizes, port configurations and port sizes. Furthermore our tanks are rust free, providing clean air for valves. Also all 9L (3 gallon) & 15L (5 gallon) tanks can be mounted in 3 angles. On end, upright or upside down and still keep drain port at bottom with our unique design. Mounting legs included. Shot based anodized or chrome finish. Also recommended working pressure is 0 - 170psi. While maximum pressure is 400psi. Sizes range from 2 litres through to 15 litres with extruded centre section and stamped ends.