Petri Dish Shrink Seals, 400/pk

Shrink Seals are colorless, transparent cellulose bands that are oxygen permeable. Used for sealing Petri dishes or test tubes to safely contain pathogenic microorganisms. Dries in under 30 minutes at room temperature and extends the shelf life of sensitive plates. Bands need to stay moist in sealed container until use. 92 x 25 mm.