- Fineston Metal LTD
- Address:B1805 marriott park center yeouidodong
- Poong San Industrial Co.,Ltd.
- Address:57,Seongju-dong ,Changwon-si
- ILSHIN TAEKWANG
- Address:232 Sinwonro
- Il Shin Taekwang Metal Co., Ltd.
- Address:604-1,Seonggok-dong ,Danwon-gu, Ansan-si
- PUNGGOK INDUSTRY CO., LTD.
- Address:Daegot-myeon
- Hani Metalworks Co.,Ltd.
- Address:(Namdong Industrial 154B-1L) 724 Kojan-Dong,Gojan-dong ,Namdong-gu
- KODO COPPER TUBE MFG CO LTD
- Address:4MA-804 Shihwa Industrial Complex, Sunggok-dong
- Kyu Sung Corporation
- Address:Pureunmaeul Ssangyong Apt. , Sunae-dong, Bundang-gu, Seongnam-SI
- KPIS
- Address:# 228 Nonhyeon-dong, gangnam-gu
- Unitra Inc.
- Address:1002 Haesung Beach Town
- Udia Metal Systems Co., Ltd
- Address:1678-1 Dong-a Vilrat Seocho 1dong Seocho-gu Seoul, Korea
- TTS International Corp.
- Address:# 4037-1, Gangdong-Dong
- YOUNG IL NON-FERROUS METAL CO.,LTD.
- Address:
- One Steel
- Address:1506-1, Songjeong-Dong
- ZayinTec & Co.,
- Address:# 102-1208, Yoonsung 3rd, Apryang
- Samwon Copper Tube Manufacturing Co., Ltd.
- Address:376-1,Jillye-myeon ,Gimhae-si
- Fineston Metal Co., Ltd
- Address:B-1805 Marriott Park Center 28-3 Yeouido-dong, Yeongdeungpo-Gu
- BORAM CORPORATION
- Address:26Dong 150 Ho, Shigung 3Dong, Kumchun-ku
- Landpia.co.ltd
- Address:1876-119, 12 Tong 1ban, Yeon San Dong, Yeon-Je Gu Busan, Korea
- Yang Bo Co., Ltd
- Address:1506-1 Seongjeong Dong, Gangseo Ku