20mm Vial Stopper, Red Rubber, Bag of 1000

20mm Vial Stopper, Red Rubber, Round bottom - Bag of 1000.
Manufactured in the USA using butylated rubber. Meets USP Class 6.
All stoppers require appropriate washing, rinsing, and sterilization, whenever applicable, to meet industry specific requirements. We do NOT sell sterile stoppers.
20mm vial stoppers are for serum vials with a 13mm hole opening and 20mm outside rim-to-rim outer diameter.