For a variety of laboratory procedures requiring constant temperature in the range of ambient to 115°C. For those procedures requiring up to 140°C, the 40590-03 will handle the job using the "high" thermostat. Each Dri-Bath accommodates one to three modular blocks (see 40592 series). These blocks are machined from solid aluminum and handle test tubes from 6 mm to 25 mm OD Includes thermostat, power switch, power and cycle lights, block handle and 3 wire cord and plug. Thermostats control within plus or minus 0.5°C. For 110V, 50/60 Hz. (Blocks must be ordered separately)