Give the trench drain system an elegant look with the Ville slot design trench drain grate. This decorative grate features an intricate design. Water drains through but leaves and debris are blocked. The drain cover features an open surface area of 45.9 sq. in. per meter and 140.6 GPM flow rate. Rated for NDS Class E loads when properly installed. ADA compliant and heel-proof drainage grate. Use two half-meter (19.69 in.) grates to cover one BG-FILCOTEN 200 8 in. trench drain. Iron grates are painted black to inhibit rust. Over time, it will form a protective iron-oxide patina.