Drainage doesn't have to be drab. Stylish and functional, the decorative Dura Slope® Channel Drain Grate with slot design complements its surroundings while stopping leaves and debris from entering and potentially clogging the drainage system. Adds a beautiful touch to driveways, pool and patio areas, walkways, and other hardscapes. The decorative grate has an open surface area of 17.46 sq. in. per linear ft. and flow rate of 53.50 GPM per linear ft. Rated for NDS Class C Loads (up to 325 PSI) when properly installed; rated for NDS Class D loads (up to 575 PSI) and H-20 rated when properly installed with the Ductile Iron Frame (DS-200H); ADA compliant and heel-proof. Made of raw iron, the grates will rust over time forming a protective iron-oxide patina that begins red-orange and ages to a deep, rich brown.