Description： GTL-GPP301 made of expanded PTFE yarn and graphite, impregnated with a unique lubricant. The graphite is integrated into the yarn so that when rubbed, the packing stays smooth. GTL-GPP3011 are equal to Gore GFO packing but at a lower cost, is manufactured through a specially engineered process. High purity micronized graphite is encapsulated in a PTFE matrix structure.