National Diversified Sales 1224GR 12" Green Decorative Wave Square Catch Basin Grate adds a stylish touch to any landscape as it drains excess stormwater. The pattern of waves function as grate openings while effectively blocking actual leaves and debris from entering and clogging the drainage system. The 12" Square Catch Basin Grate with decorative botanical design drains moderate flows from lawns, landscaped areas, patios, walkways, and under downspouts. Made of heavy-duty cast iron, it will form a protective iron-oxide patina over time. NDS iron drain grates are lightly painted black to inhibit rust formation during shipping and storage. Hassle-free limited lifetime warranty guarantees the NDS product is free from defects—or we’ll replace it.