
20mm Hole Punched Vial Seals, Green, Bag 1000
20mm Hole Punched Vial Seals, Green, Bag 1000
For serum vials with a 13mm hole opening and 20mm outer rim to rim diameter (13x20mm).
These aluminum vial seal "rings" have the perforated metal center already removed to
expose the underlying stopper (sold separately).