We are the largest copper tube producer in Korea. Our major customers are as follows. 1. ACR Copper tubes (Inner grooved tube and Plain Level wound coil) LG Electronic, Samsung Electronic, Carrier, DAEWOO, Matsusida, Daikin etc 2. Sanitary Copper Tube (Straight tube) GS Construction, Daelim Construction etc 3. Oxygen Free Copper tube (Level wound coil) LS Cable, Daehan Cable