Package comes with 3 rolls copper foil tape, included 2 roll 1/4Inch(6mm), and 1 roll 1/2Inch(12mm) double-sided conductive adhesive tapes, closure with copper tapes, the length of each is 21.9yards/20m.) These double-sided copper foil tape is a kind of metal tape, its function is to electromagnetic interference (), to avoid electromagnetic damage to the human body, of the great double insulating tape has strong decal and pure copper foil, so current will flow through both sides. In addition, it has a good effect in the electrostatic discharge. Copper tape can be used in all kinds of , mobile phones, computers, PDA, PDP, LCD monitors, notebook computers, photocopiers and other electronic products need electromagnetic shielding and DIY Craft. Great double insulating tape has strong decal and pure copper foil, so current will flow through both sides. These double-sided copper ribbons are conductive copper, with electrical conductivity and of heat. Our copper tape is a desirable choice for decorating your home, making personalised wall vinyl's, birthday light card, jewellery, stainless glass & more. Whether you're a beginner or professional, our copper foil tape caters to your imaginative needs. Wide range of applications - Used for circuit boards and machines, punching slices, liquid crystal display, interference, cell phone signal shielding, grounding discharge, DIY paper circuit, Decorate and electromagnetic shielding, electronic equipment maintenance. Size:3 Pack(respectively 6mm/0.24in, 6mm/0.24in, 12mm/0.47in) Length:Each is 21.9yards/20m or so. Colour:As Shown Material:Copper Foil Package Contents: 1set * copper tape Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.