ITEM NAME:50mm x2M Copper Foil Tape EMI Shielding Guitar Slug Snail Barrier #gib Store Home Promotion Hot Item Add to Fav.Usage : Mainly used to eliminate electromagnetic interference EMI, to prevent body harm from electromagnetic wave. Type : Copper Foil Tape. Size: 50mm x 2m. Weight: 60g / 2.1oz. Elongation: 7-7% to 3-4%.