West Ready Pack™ Flip-Off™ CCS (Clean, Certified, Sterilized) seals are provided ready to use (gamma sterilized) and are an ideal choice for small quantity filling and high-value drugs. The seal is assembled in an ISO 8 environment and comes with a matte finish, gamma stable polypropylene button in a blue color. The aluminum shell is coated for low particle abrasion and is clear lacquered. West item number: 59221128