China Standard/Nonstandard Metric Orings Kit and Imperial Kit O-Ring Set Rubber NBR/EPDM O Rings Box 382PCS 428PCS Orings Kit, Find details about China Orings Kit, Orings Set from Standard/Nonstandard Metric Orings Kit and Imperial Kit O-Ring Set Rubber NBR/EPDM O Rings Box 382PCS 428PCS Orings Kit