This 250mL Pyrex® extraction apparatus is an efficient option for general purpose use. It consists of a Soxhlet extractor with a ST 24/40 inner joint on the bottom and a ST 45/50 outer joint on the top, a special Friedrichs condenser with a ST 45/50 inner joint on the bottom and a flask with a ST 24/40 outer joint. The condenser tubulation O.D. is 10mm. For a replacement extractors only, see Cat.No. Series 1-3740; for replacement flasks, see Cat.No. Series 1-4100.