POLYSTAND SYSTEM COMES WITH TANK WITH POLYSTAND,REGENERATIVE AIR PUMP,HOSE AND ALL CAM LOCKS AND FITTINGS TO MAKE A BREWER DIAPHRAGM PUMP NOT INCLUDES SOME ASSEMBLY REQUIRED; COMES IN SIZES OF 225 GAL, 325 GAL, 1000 GAL, 1400 GAL, AND 1775 GAL.