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20mm Serum Vial Stoppers, Non Sterile
20mm Round Bottom Serum Vial Non-Sterile Stoppers are for serum vials with a 20mm outside rim-to-rim diameter. We also offer similar 20mm vial caps in white. Appropriate washing, rinsing and sterilization, if required, must be performed by the purchaser.
20mm round bottom serum bottle stopper is made out of chlorobutyl rubber. Manufactured in the USA.