3″ Round Atrium Grate A robust round, domed drain manufactured from a structurally foamed High Density Polyethylene (HDPE) with a UV inhibitor to reduce sun damage. This grate is designed with large opening slots for maximum flow while still preventing large debris from entering the drainage system. Precision engineered and manufactured to attach directly to Sewer and Drain Pipe and Fittings, Triple Wall Pipe and Corrugated Pipe. Easy to use, installs in minutes and blends well with the landscape. This product is available in green, black and sand. Typical application would be for areas where floating debris could block a flat grate. Grate can be directly attached to drainage pipe where a catch basin is not appropriate or feasible. Available in 3″, 4″ and 6″ diameters.