This metal sheath is for the refrigerator section and melts frost from the evaporator fins during the automatic defrost cycle. This part does NOT come with installation instructions. This original Samsung Refrigerator Section Defrost Metal Sheath Heater originally shipped with the following Samsung devices: RF26VACBP/XAA This is a true Samsung part! This item is NEW! Don't see your model number? Send us a message as we are happy to help!