10.0 mil (exclusive of liner). High energy safety grade photoluminescent tape. Much brighter and longer duration than standard glow-in-the-dark tapes. Glow properties of 10+ hours. Advanced pigment system with UV stability that allows for indoor and outdoor usage. Passes flame, smoke,toxicity tests. Designed for high visibility evacuation and thus recommended for poorly lit stairwells, garages, boats, etc. 3" neutral paper core/carton. Meets new ASMT standards.

Mill:

• A "mil" is a unit of thickness equal to one thousandth of an inch. 
• To convert mil to inches take mil & divide by 1000. 
• Thus, a 2 mil bag would be .002 inches thick.
• Example: Ex: 2 mil/1000 =.002 inches