Stay in compliance with Labelmaster's 3 1/2-in. Number Kits. Economical and easy to use, these kits are designed for use with blank tagboard or vinyl DOT placards and blank Square-On-Point Markings, enabling you to quickly 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 with these self-spacing, pressure-sensitive removable PVC-free vinyl numbers. Made from clear PVC-free vinyl printed with durable black ink, each kit contains 600 numbers, including extra zeros and ones and is sold individually.