Item#: CLS2LB DISCLAIMER: This unit is intended for LEGAL purposes only, to be used in accordance with local laws and ordinances. Use only in extremely well ventilated areas. Check with your local fire marshal for guidance when operating indoors Closed Loop Reclamation Extraction System (Comes with 1 yr. Limited warranty) Please Read Optional Upgrades Section for Clarification on System Upgrades DISCLAIMER: BY UPGRADING TO SWAGELOK VALVES YOU ACKNOWLEDGE THAT YOUR ORDER MAY TAKE 3-5 BUSINESS DAYS TO BE FULFILLED AND EXPEDITED SHIPPING MAY NOT BE REFUNDED. The 2lb closed loop hydrocarbon extraction system performs botanical extraction within a sealed, vacuumed system. Utilizing a top-fill input, solvent washes thru the material column, collecting oils as it passes over the material. Oil bearing solvent is collected in the collection base under the material column. Once collected, solvent is distilled and recovered, leaving the oils in the collection base. This is a passive unit that utilizes pressure differences created by manipulating temperature to move solvent. This unit can be upgraded into an Active recovery unit by purchasing the upgrade kit.