Corning polypropylene Erlenmeyer flask caps are also available separately. They are sterile, individually packaged, and available for the 500 mL and 1L, 2L, and 3L flask sizes.
threaded cap
Vented cap has 0.2µm pore nonwettable (hydrophobic) membrane
Allows gas exchange while minimizing the risk of contamination
Sterilized by gamma radiation
原厂资料：
Corning polypropylene Erlenmeyer flask caps are also available separately. They are sterile, individually packaged, and available for the 500 mL and 1L, 2L, and 3L flask sizes.
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