Synthetic Yarn Packing with Graphite braided from synthetic yarn . The high temperature lubricant is uniformly dispersed throughout the yarn and thoroughly treated with Graphite. while the lubricant helps in lowering frictional heat and enhance sleeve life, graphite helps in heat dispersion. It is a very versatile, general purpose high temp packing ideal for storeroom inventory - great for centrifugal, rotary and reciprocating pumps, and some valves.