[Conductive Copper Tape]Package comes with 3 rolls in 3 sizes(1/4in,5/16 in,2/5in) Double-sided conductive adhesive tapes(closure with copper tapes,the width respectively are 6mm/0.24in,8mm/0.31in,10mm/0.39in,The length of each is 21.9yards/ 20m.)[Major Function]:These double-sided copper foil tape is a kind of metal tape, its function is to eliminate electromagnetic interference (EMI),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.[Widely used]Copper slug tape can be used in all kinds of transformers,mobile phones,computers, PDA,PDP,LCD monitors,notebook computers,photocopiers and other electronic products need electromagnetic shielding and DIY Craft.[Dual Conductive Tape]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 resistant of heat,humidity,chemicals, corrosion,oxidation and discoloration.Wide range of applications:Used for circuit boards and machines,punching slices,liquid crystal display,eliminate EMI interference,cell phone signal shielding,grounding discharge ,DIY paper circuit,Decorate and electromagnetic shielding,electronic equipment maintenance and protect your plants from slugs and snails.Features: Quantity: 3 piecesColor: goldMaterial: aluminum foilLength:Each is 21.9yards/ 20m or so.package: 3 packs tapeOnly the above package content, other products are not included.Note: Light shooting 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.