Aramid fiber packing impregnated with PTFE is made of Dupont's continuous filament Kevlar yarn impregnated with PTFE emulsion and processed with lubricant. As the strength and module of Kevlar is as high as the steel-like strength. So this packing compared with other kinds of braided packing. They can resist more serve media and higher pressure. It can be installed separately or as end rings with other kinds of packing to combine different characteristics into seals packing ring set.