20mm Full Tear Off Vial Seals, Black, Bag of 1,000

20mm Complete-Full Tear Off Vial Seals, Black, Bag of 1,000 pieces 

Crimps on serum vials with a 20mm crimp finish (13mm hole opening and 20mm rim to rim diameter).
For use when the aluminum seal and stopper (sold separately) are to be completely removed
to POUR out vial contents. Alcohol resistant and autoclavable. Manufactured in the USA!