Permeable to oxygen during yeast culturing, breathable Foam Stoppers are Ideal for yeast starters produced in Erlenmeyer flasks.
Stoppers can be sterilized through boiling or by autoclaving. Adequate sanitation is achieved by soaking foam stoppers in Star San or Iodine.
35-45 mm fits 1000ml Flask
46-50 mm fits 2000 ml Flask
46-65 mm fits 5000 ml Flask