it was made from graphite-PTFE compound with lubricant. very good thermal conductivity. High flexibility and volumetric stability, no embrittlement or ageing. Universal resistance to chemicals with the exception of strongly oxidizing media such as oleum, fuming nitric acid and gaseous fluorine. Extremely wide range of uses in pumps (uncooled operation possible with hot water up to 160oC),agitators mixers and kneader centrifugal pumps, auto claves. for all types of industry. Long life with good operating efficiency. Gentle treatment of shafts. It seems GFO. Packing.