H-B Enviro-Safe Liquid-In-Glass Pocket Thermometer; 0 to 220F, Aluminum Duplex Case, Environmentally Friendly (B60570-2000) Ideal for field studies, waste water treatment and any on-the-go applications Contains green EnviroKleen certified liquid against white back glass Total Immersion; Length: 160mm (6.3) Hand inspected in our ISO/IEC 9001:2008, ISO/IEC 14001:2004, ISO/IEC 17025:2005 facility and A2LA Accredited Calibration Lab; Recognized and accepted by the signatory economies of the ILAC/MRA Former HB #20580