1 Roll Practical Single Conductive Copper Foil Adhesive Tape Barrier EMI Shielding 5mm X 30m Practical durable single conductive copper foil tape. Product Usage: Shielding Cavities Material: copper Tube Diameter: 122 mm / 4.81 Size: 30m * 5mm / 1182 * 0.2 (L*W)