NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response" is a standard maintained by the U.S.-based National Fire Protection Association. The NFPA 704 "diamond" label is for storage of large amounts of hazardous materials.Your HAKKO equipment is not hazardous substance or material, it is a finished product, therefore doesn't fall within the scope of NFPA labeling. Furthermore, majority of HAKKO equipment has met the fire safety testing required by UL product safety regulations.