Daikyo Crystal Zenith® resin is a high-quality engineered cyclic olefin polymer (COP). The 2mL vial offers a low particulate level and a nominal fill volume that is compatible with 13mm stoppers and 13mm Flip-Off™ seals. The vials are supplied in a ready to use, sterile format (E-beam sterilized) and are fully vision inspected. West item number: 19550210