... compressor o ring MaterialSilicone,,FKM,FPM,VITON A, VITON B, GF,GFLT,GLT,AFLAS,HNBR... ColorRed, blue, pink ... and alkali resistance and oil resistance is the best in the oil resistant rubber, good radiation resistance and high vacuum resistance.2.Good electrical insulation, mechanical properties ... rubber sealing elements manufacturer with combination of R&D,production and sales for more than 20 years. ...