1. Oil proof auto seal. 2. Heat resistant. 3. Good quality auto seal. 4. Certification: ISO9001:2008, ISO/TS16949,etc. Auto seal descriptions: 1. Materials ... : NBR, also NR, EPDM, ACM, HNBR, FLS, CR, SBR, SI, FPM, IIR, VT etc. 2. Characteristics: oil ...