... ozone resistance,good sealed function; Interphone waterproof part Silicone rubber product molding keypad Silicone rubber product molding Waterproof part for interphone seal side keypadMaterials ... CR,CM,EA,CSM,ECO,NR/IR,VMQ,PMQ,PVMQ,Silicone,Nitrile,and1. Good heat,wearability,ozone resistance,good sealed ... short lead time and praise we created the miracle ; Silicone Rubber Waterproof and Side Keypad