Morton Strongline is a thin coppered steel strip used to strengthen stained glass panel from the inside, eliminating the need for unsightly external rebars. The strip is just the right size for use between the copper foiled pieces or inside the channel within lead came projects. When vertically placed between foiled pieces, this highly functional copper re-strip is “invisible” once soldered in place, making it the perfect choice for reinforcing stained glass projects when external re-bar would prove unsightly. Sold in an easy dispense 25 foot roll. Strong Line measures .020" thick by 0.114" wide.