Buy additional Driveway Channel Drain under ASIN B00CFVNCCK. Buy individual End Caps - B00F9AD3XM, End Outlets - B00F9A2SHE and Connecting Quad - B00F9HWA1Q. The Trench and Driveway Channel Drainage System features heavy duty Galvanized Steel Grates that serve as a perfect long-term solution for the collection and dispersal of surface water. The combo pack is ideal for any domestic area where surface water collects including driveways, pools, patios, walkways and sports courts. Grates snap in and out, no screws required. Channel lengths are interlocking with a secure built-in joining system. Channels and grates are rated tor 5 tons or 10,000 pounds. Easily add additional channels by snapping them together in an extended straight line.