... , aluminum bronze and monel.resistant NBR, Viton, high temperature Viton, Hypalon, Silicon rubber PTFE Bushing: Glass backed PTFEover EPDM, PTFE over ... , aluminum bronze and monel.resistant NBR, Viton, high temperature Viton, Hypalon, Silicon rubber PTFE Bushing: Glass backed PTFEover EPDM, PTFE over ...