Color sections correspond to the NFPA hazardous materials code 704m. The color diamond is used with a numerical scale of 0-4 to indicate the health, fire, and instability of special chemicals. The bottom white section is used to show the specific hazard. Available in aluminum, plastic and self adhesive vinyl. Numbers and hazard symbols not included. For complete kit information (including numbers and hazard symbols), search for part numbers beginning with cdk.