3M 3939 silver duct tape comes in a 96 mm width, uses a rubber adhesive and is packaged 12 rolls per case. Can be used in the following temperature range: 0 F to +200 F degree. 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 duct tape has a 9 mil thickness. In addition to the other properties this product is moisture-resistant and flame retardant.