Multi-Lok braided high-purity carbon fibers made from a PAN base, with a minimum carbon content of 95.0%. (Staple fibers from PAN produce a more flexible packing than filament fibers, which tend to fracture when bent. Each strand is coated with pure PTFE and cured before braiding. During the braiding process, pure PTFE is applied throughout the body of the packing. The packing is lubricated under hydraulic pressure with a proprietary nonpetroleum lubricant containing no sulfur, silicone, or waxes.