Copper Foil Shielding Tape for Guitars w/ Single-sided Conductive Adhesive - 10-Foot Roll (10 feet X 50mm (1.97")) Copper Foil Shielding Tape - Single Sided Conductive Adhesive 10 feet X 50mm (1.97") 1 mil Thickness (see complete product specifications in description) Use to line control cavity to reduce EMI and hum.beneficial for guitars using single coil pickups. Tape is rolled and shipped as pictured.