Whip mix aqua soence water and special liquid dispencer. BRAND NEW COMPLETE UNIT includes owners manuel and everything you need to get going right out of the box. This unit measures the correct amount of water or other special liquids to match the weight of the gypsum you are using by weight on its scale and dispensing the correct amount of liquid, This insures the proper ratio of water to qypsum to insure the strongest die stone of regular stone for maximum strength. Every lab should have one of these. This is great deal here as regular retail on this unit is over#3350.00. This wont last grab it now.