... ratio 3.OEM&ODM: YES Product Description Item nameFlat o ring MaterialSilicone,,FKM,FPM,VITON A, VITON B, GF,GFLT,GLT ... , good radiation resistance and high vacuum resistance. 2.Good electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance, weather resistance ... us, thanks. Details Show practical silicone rubber flat o ring HNBR FKM FPM VITON A VITON B GF GFLT GLT ...