Standard or Nonstandard: Standard Style: O Ring Material: Plastic Place of Origin: Hebei, China (Mainland) Brand Name: JW(our brand) or customized brand Model Number: Any size Style: O Ring Material: Rubber Place of Origin: Hebei, China (Mainland) Brand Name: JW Model Number: any type Sample: Free Sample Certificate: ISO9001:2000; ISO/TS16949 Trial Order: Acceptable OEM/ODM: welcomed Function: Anti water and oil.