Flat o ring 1.Silicone FKM FPM VITON A VITON B GF GFLT GLT AFLAS HNBR... ... .OEM&ODM: YES Product Description Item nameFlat o ring MaterialSilicone,,FKM,FPM,VITON A, VITON B, GF,GFLT,GLT,AFLAS,HNBR ... , thanks. Details Show practical silicone rubber flat o ring HNBR FKM FPM VITON A VITON B GF GFLT GLT AFLAS