- Kolon Co.,Ltd.
- Address:KOLON Tower, 1-23 Byeoryang-dong, Kyunggi-Do Korea
- Jungjin Metal Enginering Co., Ltd
- Address:705 7F. Byeoksan Digitalvally 132-7 Gamjeon Dong Sasang Gu
- Naizil Corporation
- Address:# 1501 Hyundai Kirim Bldg, 1330-18, Seocho-Dong, Seocho-Gu
- Allmax International Co.
- Address:# 804,8fl, Samil Plaza Bldg.,,837-26, Yeoksam-dong
- Dong Yang-Korea Machinery Co.
- Address:477-48,Yeonsan-dong ,Yeonje-gu
- QILU KOREA
- Address:# 102-1204 Koaroo, 1209, Yongwon-dong
- STEEL ONE LTD
- Address:402, Sejin Plaza, Sang Dong Won Mi Gu
- Shinsung basic materials
- Address:149-5, Yongwol-ri, Samjuk-myeon
- Wonsan Steel
- Address:278-1,Yongdoek-ri ,Hallim-myeon ,Gimhae-si
- ANAN POL
- Address:1155-7 Sanbond Dong
- Union Steel
- Address:890,Daechi-dong ,Gangnam-gu
- Dong-a steel
- Address:woochang bldg 4F 152-2 gamjeon-dong
- Yong Kwang Enterprise Co., Ltd.
- Address:
- Grating Oversea Co. Ltd
- Address:Namdaemunno
- BongYoung Co., Ltd.
- Address:Rm No.505, SeJin BLDG, 62-9, TaePyungRo-1Ga,
- Tcc Steel
- Address:Dongyang Tower, 93, Dangsan-dong 4-ga, Yeongdeungpo-gu
- Young Heung Iron & Steel Co., Ltd.
- Address:71-1,Sinchon-dong ,Changwon-si
- Daegun Construction And Services Co., Ltd
- Address:3ba, 1005ho, Shiwha Industrial Complex, Jungwangdong
- Shinheung
- Address:1046-3, Najeon, Saenglim
- Kahwa Korea
- Address: