Obtain quick and accurate wet and dry-bulb temperatures with this handy instrument. Two thermometers, recessed in a gray metal back and attached to a folding swivel handle, provide temperature readings from -20° to 120°F in 1° increments. With the cloth wick on one of the thermometers, simply spin the unit to obtain respective temperatures. Includes spare wicks and instructions. Replacement permacolor-filled thermometers are available.