Union Corrugating 8-in x 20-ft Copper Roll FlashingCopper roll flashing is used for weatherproofing the home Simply bend, cut and shape Copper material is rust resistant and has a 3oz craft backer Added protection for your roof against the elements General purpose flashing for a variety of applications Can be used with treated lumber Features Series Name N A Color Finish Family Copper Manufacturer Color Finish Copper Thickness (Inches) 0. 01 Warranty None For Use with Vents Yes For Use with Windows