PT Tembaga Mulia Semanan Tbk engages in the manufacture of copper rod and wire, aluminum rod, and wire products. It operates through the Copper Rod and Wire, and Aluminum Rod segments. The Copper Rod and Wire segment offers copper rod and various sizes of copper wire. The Aluminum Rod segment produces electrical conductor grade rod, alloy, and target analyte list rod. The company was founded on February 3, 1977 and is headquartered in Jakarta, Indonesia.