Features a detailed calibration report stating corrections to one-tenth of the smallest division. Contains green envirokleen certified enviro-safe liquid against white back glass and is 175mm 6.9 long. Individually packaged in a recyclable heavy duty storage box.enviro-safe calibrated thermometers are individually serialized and made in the u.s. At our registered iso/iec 9001 facility. They are tested and calibrated in our exclusive triple accredited/registered iso/iec 17025 and a2la accredited calibration laboratory; internationally recognized and accepted by the signatory economies of the ilac/mra.