... quality and independent right to export. rubber o rings material: NBR viton 1) Materials: NBR, NR, FPM, MVQ, EPDM SI2) High ... /low temperature-resistant, wearing resistant, oil-resistanto-rings ... features: 1) Materials: NBR, NR, FPM, MVQ, EPDM,silicone2) Characteristics: high/low temperature-resistant ...