Designed for heavy-duty use, the CDN ProAccurate Heavy-Duty Refrigerator and Freezer Thermometer is NSF (National Sanitary Foundation) approved for restaurant and commercial applications. Made with a stainless steel housing and a durable laboratory glass lens, the RFT1 features and easy-to-read 2-Inch dial with target range indications and temperature guide. The thermometer can either stand on its own or hang from the built-in hook. 5 year limited warranty.