... packing made of different fibers,e.p carbon fiber,PTFE fiber,aramid fiber,glass fiber and mixed aramid and carbon . 1.Use: the PTFE ... valves in petrochemical industry,chemical fertilizer industry,dyestuff,coating,chemical fiber industry, pharmacy,food, etc.2.spec: Within 3x3 ... ~60x60mm.Varieties:PTFE ,PTFE asbestos,carbon fiber,graphite,and copper-graphite braids.3.Main properties:Apparent ...