Our tape is conductive on both sides. This is called, dual conductive tape. To achieve this, we made the adhesive conductive too. This is why our tape is extremely effective when used for shielding or electrical purposes. We went the extra mile making it thick. When you peel the paper backing off, the copper is .086mm thick without the paper. We use pure copper 99.9% pure. We also made it wide, 5.25 inches wide. This enables the user to cut to size. Many people buy one sided conductive tape, lay it down in strips not realizing that if the adhesive is not conductive and if the tape is only 1-side conductive, you have hindered your shielding. That is precisely why we make it wide, completely conductive even at adhesion. When it has to be perfect, you should try our tape over our competition. Use for shielding, electrical, stained glass, insulation, soldering, crafts and much more.