The Corning 3001 CoStar 800ml Tissue Flasks with .2um Vent Cap are high-quality glassware products designed for use in microbiological and biological laboratories. Made in the United States by the reputable brand Corning, these flasks come in a convenient bag of 4 units. With a vent cap size of .2um, these flasks are perfect for storing and transporting tissues and other materials in a controlled environment. Ideal for healthcare, lab, and dental professionals, these flasks offer reliability and precision in laboratory settings.