1. Quick shipment. 2. Large stock quantity. 3. Heat-proof aluminum o-ring. 4. AS568, BS, JIS, metric sizes all ... available. Description of Excellent Aluminum O-ring for Ozone-proof:1. Materials: can be NR aluminum o-ring, HNBR, Buna ... , FVMQ, MVQ, ACM, FLS, CR, SBR, SI, BR, IR, EPDM, IIR, butyl, PU, E/A, ECO, CSM, VITON, FKM ...