* Set of 4 thermometers for refrigerator and freezer * These thermometers are perfect for accurately measuring the temperature of your spaces * Plastic * 15.5 x 1.7 x 0.6 cm Set of 4 thermometers FM Professional offers you this set of 4 thermometers designed for refrigerators and freezers. Precise and high-quality, they will allow you to perfectly control the temperatures of your refrigerator and freezer. FM Professional thermometers withstand temperatures ranging from -40°C to +40°C. They allow you to perfectly manage the cold chain of your food. Usage tips: For the refrigerator: Do not place your thermometer in the door of your refrigerator or in a drawer. Wait 8 hours, avoid opening the refrigerator during these 8 hours, then take the measurement. For the freezer: The optimal temperature of a freezer is between -18°C and -23°C. The lower the temperature, the better the products are preserved.