rubber o-ring Material:EPDM Owns the patent of rubber cap. we can design the products for customers' specail need ... company:DSM or Janpanese company)2. Specifications of rubber cap,rubber gasket,O-ring,can desiged and satified for ... customerss special requirement.3. Optional colors of rubber cap,rubber gasket,O-ring,can make it on your ... .72177.482.6292223.32182.6593241.32362.65 Rubber cap