Features of the Allegiance Biohazard Labels: Use these biohazard labels to identify equipment, containers, rooms, materials, experimental animals, etc., that may contain or are contaminated with biologically hazardous agents. These pressure-sensitive labels have a biohazard symbol printed in black against a red fluorescent background as well as space for hazard identity. Labels adhere to almost any dry surface with a permanent application and are bright and easy to read. The product referenced on this detail page is sold be 10/PK.