1.we are factory 2.We have ISO9001 9002 Braided PTFE packings are made of pure PTFE yarn through braiding.Because PTFE has charactertics of excellent anticorrosion,good self-lubrication and non-sticking,therefore,braided PTFE PACKINGS possess not only good flexibility and resilience but also very excellent anticorrosive property,they almost can resist all of chemical media