Color sections to correspond to the National Fire protection Association (NFPA) Hazardous Material Code No.704M. The color diamond is used, with a numerical scale 0-4 to indicate the health, fire and reactivity of special chemicals. The bottom (white) section issued to show the specific hazard (acid,alkali,corrosive,etc.) Don't see it - We can make it. We will customize Right To Know Signs for you. Fill out a simple online form by clicking here.. Alternatively, you can call toll-free 1-866-753-6257 or email customerservice@tuffrhino.com for a custom quote.