PP, Teflon^® TFE stopcock and housing, PP screw closure. Phase interface visible down to stopcock. Funnel and screw closure are chemically inert, translucent, autoclavable and have no known solvents at room temperature. They are susceptable to softening and swelling from strong oxidisers and aggressive solvents. TFE stopcock assembly has excellent chemical resistance, is leakproof and does not require lubrication. Disinfect chemically. Autoclavable, leakproof.