Description:Braided from shrink-proof synthetic fiber impregnated with PTFE, silicon-oil-free, which is oxidized polyacrylonitrile fiber. Compared to traditional carbon fiber packing, it is not brittle, can suited for high peripheral speeds and food industries. Oxidized fiber has high strength and good thermal conductivity, PTFE makes the packing have excellent self-lubrication, so this packing does not damage shafts and has long life.