High quality thermal switch assortment contains 5 brand new thermal switches. Each is designed to operate a set of contacts (bi-metallic) when a certain temperature is reached. We do not have data on these but each is new and each has a part number and/or other data printed on it. The contacts are designed to reset when temperature of unit drops. Any one of these costs much more than the entire assortment. Sold in a package of 5. Note: assortments will vary from picture.