Separate Liquids with Precision: Purer extractions lead to more accurate work. Precisely separate compounds using the glass separator funnel and the leak-proof PTFE stopcock. The separation flask is designed for solvent/liquid-liquid extraction and is an essential tool in any lab. We recommend you run an extraction at least 2-3 times for the best results (distillation may be needed to remove impurities). Constructed To Lab and Industrial Standards: The American Fristaden Lab Separatory Funnel can handle tough, corrosive materials and high and low temperatures without breaking. The separating funnel is made with lab-quality borosilicate beaker 3.3 glass, which can handle much more stress than standard glass. The seperatory flask also features a corrosion-resistant PTFE stop cock. Packed So It Won’t Break: Our glass conical separatory funnel, encased in sturdy foam packaging, will safely make the journey to your door. American Company: Fristaden Lab is an American lab equipment company. We back the separatory funnel with a 1 Year Warranty. If you have any problems with or questions about the lab scale, please feel free to reach out and we would be happy to provide assistance. 1000 mL Separatory Funnel