Multi-Lok braided high-purity carbon yarns made from pitch base, with a minimum carbon content of 95.0%. (Staple fibers from pitch base produce a more flexible yarn and packing than filament yarns, which tends to fracture when bent. Each individual strand is coated with pure PTFE and cured, prior to 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 non-petroleum lubricant, containing no sulfur, silicone, or waxes.