1. These injection vials are intended to be colosed with 20mm rubber stopper plus 20mm crimp seal aluminum cap. 2. 10ml injection vial, 20mm sterile butyl rubber stopper and 20mm aluminum cap amke an air tight and water tight seal. 3. 10ml injection vial, 20mm sterile butyl rubber stopper and 20mm aluminum cap sold by together or seperately. 4.