These hardworking perforated aluminum guards for 5in guttes are made by E-Z Gutter, the leader in gutter protection. Since 1983, E-Z Gutter has been engineering innovative designs for every type of gutter and debris load. E-Z-Flow Gutter Guards are simple to install, just screw to the front lip of the gutter with supplied stainless steel screws. The heavy-duty painted aluminum won’t rust or rot. Designed to stay put during rough weather and handle a large snow load. The black color is attractive as it visually blends with the roofline, but more importantly, it absorbs solar heat to expedite melting of snow and ice.The round perforations are designed to allow maximum water through but keep out debris. Each section is notched for 3/4in in overlap and each box of guards will cover 39.25ft of gutter.