... .5mm-30mm 3,wide temperature zone PTFE tube is made to thick wall with virgin powder for machine parts and others like ... packings, gaskets, valve seats, selflubricating bearings, piston rings etc.Hose tube made from PTFE powder ... , non-stick, and will be long life service.Inside: PTFE hose, for high and low temperature used, anti-corrosive, non-stick.Outside ...