PTFE molded tube made of telfon material,has a lot of advantages below: 1>Good resistance to high temperature and low temperature. 2>Excellent resistant to aqua regia and all kinds of organic solvents. 3>High lubricating ability and non-sticking. 4>Excellent electric property and long life performance 5>Widely applied in fields like machinery, automobile, electronics, chemicals and valves et if you have any purchase,please contact yongxinseal at live dot com,we shall supply lowets price and high quality for you.we supply all sizes,maximum outer diamter is 500mm,length 300mm. We supply all sizes.