Brand new in box. These pumps are suited for botanical extraction, like distillation, freeze drying and a number of other processing techniques. Easily control the ultimate pressure of this dual-stage rotary vane vacuum pump thanks to its adjustable gas ballast. The built-in backflow preventer helps avoid oil contamination in case of an unexpected shutdown. Plus, the low decibel rating (56-58) makes it one of the quietest rotary vane vacuum pump available.