Rooftop Algae/Moss Prevention Copper Tape (66 Feet) (Use with Drip-Edge Extensions ) Each copper tape roll contains 66 feet of single sided, peel and stick real copper tape. Rolls are one inch (1”) wide and are widely used for Algae and Moss prevention on asphalt shingles. The copper emits a natural chemical during a rainstorm that fights the algae/moss growth on the shingles BELOW the strip adhered to the Drip-Edge Extension by DCI Products. Use quality household scissors to cut the tape and Drip-Edge Extension. For bulk orders please call us directly at 610-622-4455 and ask for Contractor Sales Shipping: 9.95 Per Box Total Feet: 66