HY-S200G Graphitized PTFE Packing, or Teflon Graphite Packing, is manufactured through a specially engineered process. High purity micronized graphite is encapsulated in a PTFE matrix structure. The graphitized PTFE yarn (comparable to GFO® ) combines high thermal conductivity from graphite with all other great properties of PTFE. This combination gives the HY-S200G packing great sealing properties that other products cannot offer: compressible, durable, self-lubricating, chemical resistant and heat dissipating.