Heat-resistant acrylic adhesive on malleable copper foil. The extra thick adhesive makes for an excellent fast attachment, with stronger bonding that allows for tighter fit. Total thickness 1.5mm, 7/32in wide, roll length 36yd/33m. This is the most popular thickness in the U.S., and works well for hand foiling or with a foiling machine. This is also the preferred foil for lampshades. Made in America!