If you're shipping hazardous materials, whether it is by air, highway, rail, or ocean, you're most likely required to label your products with the corresponding hazard class. DOT Pressure-sensitive labels conform fully to the guidelines issued by the U.S. Department of Transportation (DOT) (49 CFR), IATA / ICAO, and the International Maritime Organization (IMO). Most DOT labels measure 4" x 4" (100 mm x 100 mm); they are made of pressure sensitive peel-off heavy weight coated paper with fade-resistant UV-inks and are available in rolls of 500 and / or lesser quantities. Always ensure you're shipping in conformity to domestic and international standards DOT, ICAO, IATA, and IMDG. These hazmat labels may be mandatory for domestic and international shipments of hazardous materials. We will gladly match any online advertised price. Please inquire or call us at (866) 272-9880 if you require any further information. Our friendly customer representatives will be glad to help.