NFPA Hazard Identification signs.
If you are mounting this sign to a plastic Rhino Tuff Tank, you must order the ACM sign which comes with pre-spaced holes & qty. 2 1/4-20 x 1.5″ machine screws w/ 1/2″ spacers for installation
See below for the hazard identification system scale
$17.50
| Dimensions | .125 × 12 × 18 in |
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The following links should provide all relevant info on the chemical you need the placard for, just search for the chemical name: CAS # Lookup 
NFPA Hazard Identification