The 3M Scotch black insulating tape has a dielectric strength of 1150 v/mil. Provides a tensile strength of 15 lb/in to provide the holding power you need. The overall width measures 0.75 in. Thickness is a key component to use of this product and measures in at 7 mil. This insulating tape meets the following standards: CSA 2.22, UL 510, ASTM D3005-99 Type:I, CID A-A-55809B. Additional, and potentially important, information was collected about this product: 3M Category: Vinyl Electrical Tapes