7/32" Hand Foiler & 7/32" Copper Back Copper Foil Glastar Hand Foiler 7/32" - This product is a perfect tool for centering and applying the foil to the edge of a piece of glass. Specifically designed for 7/32" copper foil and 1/8"(3mm) thick glass. Venture 7/32" Copper Back Copper Foil (1 roll) - 1.0 mil Thick, 7/32 IN X 36 YDS(4.76mm X 33 M)