H-B Easy-Read Pocket Liquid-In-Glass Thermometer; -5 to 50C, Window Metal Case, Environmentally Friendly (B60370-0700) Equipped with Window Metal Case to protect from breakage Lead-free, yellow back glass and black liquid provides easy readability and fewer reading errors EnviroKleen certified; Contains non-toxic, biodegradable, Enviro-Safe liquid; Traceable to NIST Ideal for field studies, waste water treatment and any on-the-go applications Range: -50/50C; Divisions: 0.5C; Accuracy: 5C; Length: 160mm (6.3"); Total Immersion