For use with RapidVap N2 Evaporation Systems only. Not compatible with the RapidVap N2/48 Dry Evaporation System (which cannot accomodate stemmed glassware). 

The ground glass tubes offer better fit and heat transfer for faster evaporation rates. The stems are designed for use with Cool-Zone timed end point determinations. To minimize evaporation time, the tube with the correct end point stem should be used. 

Flat-bottom tubes are for use in applications when samples are taken to dryness. Use the chart below to select the correct tube for your sample volume size and desired end point volume.