These Funnel is made of Polypropylene, giving excellent contact clarity and strength. The pear shaped, autoclavable separating funnel has a leakproof threaded screw cap. The Polypropylene stopcock, fitted with a self lubricating PTFE plug, is push fitted to the stem of the seperatory funnel. Separating Funnels are available in 100,250 & 500 ML.