Each easy-to-read thermometer includes an individualized thermometer calibration report stating corrections to one-tenth of the smallest division, unique report number and nist standards used for the calibration. envirokleen certified non-toxic, biodegradable, enviro-safe liquid, against lead-free, yellow back glass provides easy readability and fewer reading errors ideal for use in chemical/petrochemical laboratories, universities, scientific institutions, food and beverage processing, pharmaceutical and medical industries, dairies, breweries and distilleries individually serialized