The Clevenger Oil Extraction Apparatus is designed to extract oils from botanical materials. The apparatus operates by heating water, generating steam that is passed through the botanical matter. This steam carries the essential oils, which condense into a separate chamber for collection. Clevenger Apparatus with Glass Stopcock are manufactured from Borosilicate 3.3 glass. The apparatus comes with a collection pipette and all ground joints are 24/29 or 24/40. Packing: 1Pc/Pk Item Code Model Pcs/Pk Joint Size 18.00.0430.10OLW Oil Lighter than Water -10ml 1 24/29 18.00.0431.25OLW Oil Lighter than Water -25ml 1 24/29 18.00.0430.10.24.40OHW Oil Heavier than Water -10ml 1 24/29 18.00.0431.25OLW Oil Heavier than Water -25ml 1 24/29 18.00.0430.10.24.40OLW Oil Lighter than Water -10ml 1 24/40 18.00.0430.10.24.40OHW Oil Heavier than Water -10ml 1 24/40 18.00.0430.100.24.40.LW Oil Lighter than Water -100ml 1 24/40 18.00.0431.100.24.40.HW Oil Heavier than Water -100ml 1 24/40