PT Tembaga Mulia Semanan Tbk (TBMS) is a manufacturer of copper rod and wire, and aluminium rod and wire products. Started in 1977, it was established as the first copper rod supplier in Indonesia with SCR (Southwire Countinuous Rod) system. Its commercial operations of copper rods and wire commenced in 1979. Then, it went IPO in 1990. The company acquired an aluminium rod plant in 2001. Hence, it also now produces aluminium rods and wire.