Copper Foil Tape
Top quality, Venture brand foil. 108 feet long (36 yds).
Copper-backed foil is 1 mil thick, black-backed is 1.25 mil thick, and silver-backed is 1.2 mil thick.
1mil thick copper foil is easier to fold down over the edges of your piece than standard 1.25 mil tape. Wide, use with thick glass or when the strength of your project is important.