I have an RO that was used in medical equipment manufacturing to make pure water. Its an osmonics machine with a 3HP 3 phase pump motor and a Tankaflo high pressure pump. The membrane canister is aluminum and is 4inches diameter by 84 inches long. The membranes are included and should still have some life left in them as the manufacturer usually replaced them when they hit 94% efficiency. You will need a secondary pump as well as a few misc. fittings and a phase converter. This is a great project start from someone looking to set up a DIY RO. The origianl set up did over 300gph. Asking $2000 or BO. Send me an email for pictures