Supco ST03 Stainless Steel Refrigerator Freezer Thermometer, -20 to 80 Degrees F REFRIGERATOR THERMOMETER - The refrigerator/freezer thermometer is ultra-durable and is easy to hang or stand up. The temperature range is -20F to 80F (-30C to 27C). PREMIUM REPLACEMENT - Supco ST03 refrigerator thermometer is made from stainless steel and includes an unbreakable lens. HIGHEST-QUALITY PARTS - Supco parts are built to last and a popular choice among repair technicians and DIYers.