The OZ Combi-wall System, also called Tubular Combi-wall System, is composed of pipe, cold-rolled or hot-rolled C9 connectors, and Z intermediary sheet pilings. The interlocks are welded to the pipe to connects the pipe to the sheet pile. The pressure is transferred to the pipe from Z sheet pile. Pipe piles in Tubular OZ Combi-wall System usually have large diameters to retain members and bear vertical loads. Sheet piles are usually shorter than the pipe piles because they are designed to retain earth and transfer load. We can produce both hot-rolled and cold-rolled connectors to satisfied different requirements.