Keep moisture loss to a minimum and protect the contents of your laboratory items with a flexible covering for test tubes, beakers, petri dishes and more. Convenient, flexible and self-sealing - Parafilm M laboratory film is an essential item in health care, pharmaceutical and research labs. Features: Flexible and self-sealing material allows it to cling around irregular shapes and surfaces, Stretches more than 200% of original length, Resistant up to 48 hours against many polar substances, Reduce the risk of tampered data with a covering that is odorless, colorless and semi-transparent, Prevents moisture and volume loss due to material composition and tight seal