Tough-Spots® are chemically inert, polyvinyl labels that adhere to all plastics. Tough-Spots withstand boiling water baths, conventional and cryogenic freezer temperatures, most organic solvents, caustic agents and other challenges without peeling, becoming brittle or degrading. Tough-Spots® will accept any writing instrument, just write, peel back the release paper and affix to the top of a microtube or flat top cryovial. Ideally used on 0.5 -1.5ml tubes. Tough-Spots are useful for tagging a wide range of small containers in the research laboratory. A choice of colours available, please select from the drop down list.