Studio Pro 7/32-Inch Silver Lined Copper Foil Tape COPPER FOIL TAPE - Great for stained glass art. GOOD FOR TRANSPARENT GLASS - Black core hides the appearance of foil. EASY APPLY - Built-in dispenser keeps roll orderly. DIMENSIONS - Standard 7/32" width. 1.0-millimeter thickness. 36-yard roll. DURABLE - Remarkable resistance to temperature and weathering.