Two SIHI 50523 liquid ring pumps capable of 560 CFM at 26 Hg. Like new . They come with 2x20 Hp motors and a service water cooling system with holding tank. All piping and valves are stainless . currently wired 3 phase but could be converted to single or diesel engine quite easy . These pumps new list for $10 000 plus . If you had to build this unit it would run you into the 40 000 range. Perfect for a large operation . Too big for mine !