Top quality Edco copper foil is made with Top quality Edco copper foil is made with dead soft copper and boasts the strongest adhesive in the industry. It sticks closely to each piece, even around tight curves, adding strength to your finished piece. Silver backed foil is ideal for projects using transpaent glass or for projects where solder seams will be left silver. Foil measures 1/4 inch wide. Sold in a 108 foot roll.