... , FPM, etc.2. Characteristics: good physical and chemical properties flat o-ring. 3. Hardness: 30~90 shore A or IRHD ... o ring, etc. or upon your color codes. 6. Processing: all manufacturing processes are complied with ISO9001:2008. Please contact ... FDA, NSF, KTW, WRAS, LFGB, etc. 8. Applications: automobile flat o-ring, electrical appliance, mechanical, industrial, construction, household, medical and ...