This H-B Instrument DURAC Plus total immersion thermometer is toluene filled with white back glass and has a temperature range of -50 to 50°C. The thermometer meets all requirements for physical dimensions and accuracy of ANSI/SAMA Z236.1-1983 (where ranges are specified - ANSI Z236.1-1983 only has specifications for total immersion organic filled low temperature thermometers, not partial immersion). The meniscus will be visible in the appropriate low temperature application. Individually packaged in recyclable Safety-Pak packaging with a non-roll fitting. Magnification augments readability, but it is not a requirement. We suggest our magnifier to enhance readability. Range: -50 to 50°C. Divisions: 2°. Length: 305mm (12 inches). Immersion Length: Total. Accuracy: 3°C. Thermometer Fill Type: Toluene. Glass Type: White back. 25/Case. H-B Instrument #: 2/0505. Per Each. HB Instrument #: 2/0505.