... resistance,good sealed function; ISO 9001:2000,Silicone Rubber Seal Keypad for interphone OEM Product: Silicone Rubber Seal KeypadMaterials:NBR,SBR,CR,CM ... ,PMQ,PVMQ,Silicone,Nitrile,etc;1. Good heat,wearability,ozone resistance,good sealed function;2. Various material and specifications in customized;3 ...