It is a 2009 Lapierre 600 Expandable. We had the plugin for the second membrane installed so that part is already expanded. You would just need another vessel and it would then be a 1200 unit. We are selling this with everything included which includes: the main unit, one vessel with a recirculation motor on the bottom, a stainless steel wash tank(approx. 20 gal. /-), a valve panel with 4 three-way valves to direct the concentrate and permeate flow for concentrating, rinsing, washing, one H2O 70-400 membrane, and one membrane storage canister. We also have several containers of Lapierre soap for washing (probably a few seasons supply) that comes with it. The membrane was used just one season but was really slowing down toward the end, so it would probably need to be professionally cleaned or replaced to achieve optimum results. We also replaced the main shaft in the pressure pump one year ago so it is basically new. This machine has worked very well for us for the last 5 yrs., we are just upgrading to a larger unit. We are asking $7,500.00 but will also take best offers because we really want it moved out of our way. For offers or questions please call Samuel 231-742-1930 or email KaszaSugarBush@gmail.com