... are: (1) PFA transparent tube, PFA insulation tube ,PFA heat shrink tube , PFAcoil pipe , PFA corrugated / bellows tube, ... welding rod. (2) FEP/F46 transparent tube, FEP insulation tube, FEP heat shrink tube, FEP coil tube, FEP corrugated / bellows tube, FEP film, FEP rods. (3) ... excellent non-adhesive properties of the PFA material. PFA tubing has an almost universal chemical resistance. It is free ...