3/16" Hand Foiler & 3/16" Copper Back Copper Foil Venture 3/16" Copper Back Copper Foil : 1 Roll, 1.0 mil Thick, 3/16 IN X 36 YDS(4.76mm X 33 M) Glastar Hand Foiler 3/16" : This product is a perfect tool for centering and applying the foil to the edge of a piece of glass. Specifically designed for 3/16" copper foil and 1/8"(3mm) thick glass.