279pcs O-Ring Assortment 279pcs O-Ring Assortment1. Materials: NBR,also can be NR, HNBR, MVQ, ACM, ... , IIR, PU,E/A, ECO, CSM, VITON, FKM, FPM, etc.2. Characteristics: oil proof, aging resistant, heat resistant, wear resistant, chemical ... for some of the products.12. Production lead time: 1~2 weeks.13. Small order quantity is welcomed. O-Ring Assortment