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These pre-cut peel-off round labels for 0.5ml to 2.0ml microcentrifuge tube tops are chemically inert and flexible white and colored polyolefin labels that adhere to most plastics as well as glass and metals. These labels withstand temperatures from -196°C to +100°C (vapor and liquid phase nitrogen storage, up to moderate oven temperatures) and can endure sustained humidity and soaking, submersion in boiling water baths, autoclaving, organic solvents, caustic agents and other challenges without peeling, degrading or becoming brittle.

Tough-Spots label sheets are specially designed to permanently accept laser printing and accepts any marking instrument. Just write or print from a laser printer, peel back the label and affix to the top or side of a microtube or cryovial. Rainbow Pack includes 4 sheets of each color: Blue, Green, Orange, Red and Yellow.