Give outdoor drainage an elegant look with the Dura Slope® Channel Drain Grate featuring the Via slot design. The decorative grate design allows water to easily flow through while preventing leaves and debris from entering and potentially clogging the drain pipes. The decorative grate has an open surface area of 22.90 sq. in. per linear ft. and flow rate of 70.10 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. The grate is made of ductile iron and will rust over time forming a protective iron-oxide patina that begins red-orange and ages to a deep, rich brown.