... 2. Fire resistance 3. Radiation resistance 4. Oil resistance silicone mobile phone case MaterialNR,CR,NBR,SBR, SILICONE,VITON,EPDM, HNBR, BUNA, etc ... ,250T, 300T and 500TSize/colorThe size and color can be designed by the customerRubber CompoundCan be UL, FDA, ROSH or REACH ...