This mercury-free thermometer tube uses a high-visibility red to register the temperature on both the Fahrenheit and celsius scale. Mount the thermometer to any window or glass surface using the two suction cups. With vibrant designs on clear acrylic, these thermometers are attractive as well as practical. The suction cups can be removed to attach the thermometer to other surfaces. Attractively packaged for year-round gift giving. Vibrant designs on clear acrylic. Thermometer is hand silk screened with as many as 16 colors, making each one a work of art. Measures 8-inch length by 3-1/2-inch width.