Both extraction and concentration can be performed with this unit. A removable Snyder column sidearm and return tube is designed for easy cleaning. Taller overall height allows longer solvent residence time, increasing efficiency. Return tube has a 186-821001-0004 PTFE plug with a 4mm bore. Manufactured from 33 expansion, low extractable borosilicate glass conforming to USP Type I and ASTM E438, Type I, Class A requirements.