There are two kinds of PTFE rods .
One is manufactured by paste extruding method in diameter from 4mm to 9mm and the other is made by ram extruding method in the diameter from 10mm to 150mm;rods over diameter 150mm are manufactured by moulding.
PTFE is the most chemical-resistant plastic of all known does not age.
PTFE has a wide range of practicable temperature from-180℃ to+260 ℃and a wax-like surface to which anything hardly sticks.
PTFE has the lowest coefficient of friction of all know solid materials.
It has the best electrical properties of all plastics.

Electrical insulation ,seal,antisticking material.