... 1, No.2, No.3, No.5Valve SeatsCreep Resistance, Low Friction, Chemical ResistanceNo.1, No.2, No.3, No.5SealsCreep ... Resistance, Low Friction, Low Wear, Chemical Resistance, ToughnessNo.1, No.3, No. ... , Low Friction, Weathering ResistanceNo.3Piston RingsCreep Resistance, Low Friction, Chemical Resistance, ToughnessNo.1, No.2, No.3, No.5 Filled PTFE Products