Complete blank DOT tagboard or vinyl placards and blank Square-On-Point Markings with Labelmaster's 3 1/2-in. Number 4 Labels. Use these self-spacing numbers to create the placard you need for shipping hazardous materials. Simply choose the blank DOT hazard class placard that meets 49 CFR placarding requirements for the commodity you are shipping, then fill in the 4-digit UN number that meets DOT specifications for domestic as well as international shipments. These highly visible numbers can also be used to display the hazard ratings on NFPA standard and magnetic signs, and to identify aisles, bin racks and stock shelves in your warehouse. Printed in black on clear PVC-free vinyl, these removable pressure-sensitive numbers measure 2 1/8 x 4 in. and are sold in packs of 50.