PTFE stopcock assembly can be chemically disinfected
FEP is more translucent than PP
Funnels are available in polypropylene (PP) with PP screw closures or translucent FEP with TEfZEL® ETFE screw closures. Nonstick and nonwetting FEP funnels are ideal for use with many chemicals including hydrofluoric acid. All funnels have PTFE plug and housing. Funnels are leakproof and require no lubrication. Autoclavable (except stopcock, which should be chemically disinfected). Stem lengths are 65 mm with an OD of 8.5 mm. NALGENE.