Material : PTFE、TFM、VITION//COATING PTFE、SILICONE//COATING PTFE、HMER、EPDM、NBR
MATERISL:GLASS+PTFE、BRONZE+PTFE、BRASS+PTFE、GLASS FIBER20%+GRAPHITE5%+PTFE
MATERISL:PTFE、CARBON+FIBER+PTFE、GLASS FIBER20%+GARPHITE5%+PTFE