The DiversiTech® HFL-4300 fusible links, 300 deg fusible temperature, in-line type, pack of 4 are temperature sensitive, one time devices. Engineered as safety links, they open the circuit if the designed limit temperature is reached. This product was made by DiversiTech® for the DiversiTech® branded items.

DiversiTech® In-Line Fuse Link, 300 deg F