Label, 3/8" Circle, Blue, PVC, Tough-Spot, 1000/Roll. Temperature resistant from -196 to 80C. Easy to write on - accepts writing from most lab markers. Convenient - dispensing box assists in labeling individual tubes used in small experiments. Options - variety of sizes, colors, and formats ensures the right label for the job. Tough-Spots are chemically inert and flexible PVC labels that adhere to most plastics as well as glass and metals. These labels withstand temperatures from -196C to 80C and will accept writing from most lab markers. A variety of colors, sizes and formats ensures the right label for the job.