7 mil (0.178mm) PVC Electrical Insulation Tape, Synthetic Rubber adhesive. For wire and cable insulation, bundling, primary splice insulation at no more than 600V. Non-flame retardant. Adhesion: 16.4 oz/in. Voltage break-down: 8KV. Tensile14.8 lb/in.Elongation: 180%. Temp. resistance: 176 ēF (80 ēC). Highlighted sizes are cello-wrapped (no label) - 10 rolls/tube sleeve. Other sizes are slit to order, and are bulk-packed, separated by silicone sheets. 11/2" (38.1mm) UL listed core.

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