H-B Enviro-Safe Liquid-In-Glass Pocket Thermometer; 20 to 120F, Closed Metal Case, Environmentally Friendly (B60570-1600) 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 #20575