AS568 standard OEM high quality NBR rubber o ring NBR material, 1. AS568 standard OEM high quality NBR rubber o ring features :1) Material: ... NBR ( NR, FPM, MVQ, EPDM are available )2) Characteristics: high/ ... NR, FPM, MVQ, EPDM are available ) Characteristics a. high/low temperature-resistant b. wearing-resistant c. oil-resistant Specifications ...