NDS pro Series  Gray  Polyolefin  Channel *Diameter: N/A in. *Shape: Channel *Product Type: Grate *Length: 39-3/8 in. *Material Type: Polyolefin *Color Family: Gray *Packaging Type: Bulk *Usage: Residential and commercial storm water management *Compatibility: Corrugated Pipe *Material: Polyolefin *Connection Type: Hub