Stainless steel micro-mesh blocks leaves, pine needles and roof grit from entering your gutter. WHY MICROMESH? - 100% Manufactured in the USA, Heavy .019 gauge painted aluminum, Color-matched ½ zip screws included, fits on top of gutter, Double banded for easy installation and no sharp edges or damage to your roof because it does not touch your roof or shingles, Innovative pressing technology like no other that secures stainless steel mesh into aluminum frame safely, Will not gather rust or degrade over time