These economical Pyrex® separatory funnels are designed to reduce replacement costs by providing replaceable components. These sturdy, durable funnels are designed for long life and maximum safety. The replaceable PTFE PS stopcock assembly has a simple screw thread locking nut and collar which ensure that the stopcock cannot fall out in use. The tip has a stem that is also replaceable. Its ground end provides a better grip and helps prevent the tip from falling out. The funnel comes complete with a high density ST polyethylene stopper. For replacement polyethylene ST stoppers, see Cat.No. 1-7624; for replacement PTFE locking stopcock assemblies, see Cat.No. 1-2116-LSO; for replacement tips, see Cat.No. 1-6406-GTO.