Model No: 386 pcs rubber o ring kit 5C Material: NBR Spec: 30 sizes, total 386 pcs, JIS ... B 2401 standard 1. 386 pcs rubber o ring kit 5C features :1) Material: NBR, FKM, EPDM, MVQ(Silicone)... ... pcs16 sizes190 pcsnonstandards125 pcs18 sizes125 pcsnonstandardsManufacture & Goods Show: Production Equipment : Testing Equipment : Goods : Certificated Approval : Our Features: we owns international ...