H-B DURAC Dry Block/Incubator Liquid-In-Glass Thermometer; 0 to 80C, 100mm Immersion, Organic Liquid Fill (B60810-1600) Temperature range: 0 to 80C; divisions: 0.5; length: 250mm; immersion length: 100mm (3.9 inches); accuracy: 0.5C Thermometer fill type: organic; glass type: white back Incubator thermometer is individually serialized and designed with a swell in the body to hold the thermometer in place