Mount Labelmaster’s Blank Markings for clear communication and compliance with DOT requirements when transporting hazardous materials. Choose from magnetic blanks for metal substrates or fiberglass blanks, which can be drilled for mounting on trailers, or white rigid vinyl panels made for mounting in Slidemaster® holders. Priced per marking, so you can keep costs down by ordering only what you need, these markings make it easy to keep your eye on the bottom line.