... QA Equipment 3.OEM/ODM 4.auto rubber ring industrial Waterproof auto rubber ring seal:Details of auto rubber ... tolerance. 3. Tolerance: strictly upon ISO 3302-1:1996(E) M-Class or as your requested.4. Color: black, transparent, ... report and other documents.6. Applications: automobile, electrical appliance, mechanical, industrial, construction, household, medical and other fields. 7. Packing: PE ...