Pliable closures for use with evacuated blood collection tubes and glass and plastic test tubes

Seals inside test tube or over tube rim. The 12mm and 13mm closures seal over the rim of either 12mm or 13mm tubes, and when reversed seal inside 10mm tubes. The 16mm closures seal over the rim of 16mm tubes, and when reversed seal inside 12mm and 13mm tubes.

They protect from contamination and prevent evaporation. Closure will not crack or pop off.