​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Chesterton 1760 is a unique packing consisting of a PTFE yarn lubricated​ with graphite particles that diss​​​ipate heat. The finished packing is further lubricated with a special silicone oil for quick break-in.