The gutter guard is a high-quality, rust-proof gutter protection system made of heavy-duty (.018 gauge) 100% aluminum. It comes with a lifetime warranty covering no rust, rot, or product self-deterioration. Designed primarily for hidden hangars but compatible with all hangars, including K-style, it does not void roof warranties, even for Fortified Roofs. The gutter guard is capable of handling heavy rainfall with 380 - 1/8 in. diameter holes per linear foot and is virtually invisible from the ground. Each piece measures 47 in. in length and 5 in. in width, installing at 46.5 in. with an overlap tab. A 100 ft. box contains 26 pieces. Installation is easy with tabs for seamless joints and requires 1/2 in. 8 Zip Screws.