Purple Flip Off Tear Off Vial Seals, West, Bag 1000. For use on serum vials with a 13mm diameter hole opening and 20mm rim to rim diameter. The plastic lid will flip off and expose the underlying stopper for use with a syringe - or - a metal pull tab underneath the plastic lid can be pulled down to completely remove the aluminum seal and stopper (sold separately). This will allow contents of the vial to be poured out. Serum vials, vial seal, vial stoppers and vial crimpers sold separately. See: VIAL PACKAGING Worldwide shipping and Customs broker clearance available to several countries upon request.