39.5", Single Storm Drain Channel, With Gray Grate, A Surface Water Drainage System, Easy To Install, Grates Clip In, Bottom Outlet Accommodates 4" Drain Pipe, Light Weight, UV Inhibited, Rated For 5 Tons, Heavy Duty, Made From 100% Recycled Polypropylene, Can Be Used To Drain Driveways Between Garage & Driveway, Patios To Prevent Water Pooling, Swimming Pools To Divert Pool Water Away From Grass Or Flower Beds, Gardens, Sport Courts & Walkways.