Let the currents of excess stormwater flow away into the stylish catch basin drain grate that complements its surroundings. The decorative pattern is inspired by nature and features 3/8 in. grate openings to block pipe-clogging leaves and debris as it drains the excess water away. The 12 in. Square Catch Basin Grate with decorative wave design is ideal for draining moderate flows from lawns, landscaped areas, patios, walkways, and under downspouts. Made of high-density polyethylene (HDPE) treated with UV inhibitors.