... ring food grade 1.Silicone FKM FPM VITON A VITON B GF GFLT GLT AFLAS HNBR... 2.High ... o ring food grade MaterialSilicone,,FKM,FPM,VITON A, VITON B, GF,GFLT,GLT,AFLAS,HNBR... ColorRed, ... and high vacuum resistance.2.Good electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance, ... o ring food grade in mechanical parts HNBR FKM FPM VITON A VITON B GF GFLT GLT AFLAS