A powerful 3.9L closed circulation system with excellent cooling capacity designed to work with laboratory equipment such as rotary evaporators. Non-CFC R404 coolant used for refrigeration. Easy maintenance of air intake filter. Rotatable connector which can freely be moved and be set in the desired orientation. Convenient drainage of waste water. Compact and space-saving to fit on laboratory tables and limited space. Temp. range: -20 C ~ 30 C.