Cover your bases when shipping or storing multiple substances that are considered explosive hazards with multiclass 1.4 label with tabs. These enable shippers to complete the Hazard Class 1.4 label with the required Division Number and the Compatibility Group Letter. These letters are used to specify controls for the transportation and storage of explosives to prevent an increase in hazards that might result if certain types of explosives were stored or transported together. These labels meet the standards set by the DOT and other regulations, so your shipments will arrive on time and fully compliant.