3M 1181 copper tape comes in a 1/4 in width, 18 yd length, uses a conductive acrylic adhesive and is packaged 36 rolls per case. Provides a tensile strength of 25 lb/in. When purchasing this product, consider the thickness. The variances in thickness often make an important difference in proper performance. This copper tape has a 2.6 mil total thickness. This copper tape meets the following standards: MIL-STD-202 Method 307, UL 510.