- Jung Ho Silup Co., Ltd.
- Address:560,Jaesong 1-dong ,Haeundae-gu
- Leti Co., Ltd.
- Address:4f, Shilla Techno Vil, 39-3 Dang-dong, Kunpo-shi, Kyunggi-do
- DONG SHIN CHEMICAL CO.
- Address:241-1 Sachang-ri, Guemwang-eup,
- Ducksunghitech
- Address:DAE SUNG BLDG., NO. 679-30, JAYANG-DONG. KWANGJIN-KU.
- A-JU INDUSTRIAL CO., LTD.
- Address:662-11, Sunggok-Dong
- Shinwon P&F
- Address:265-7 Yangjea-Dong, Seocho-Gu
- Ducksung Hitech Co., Ltd.
- Address:1,Seokchon-dong ,Songpa-gu
- HIS INDUSTRIES Co., Ltd.
- Address:# 931-26, Bang Bae, Seocho
- GoodSeal Inc
- Address:214-22, Duckwoo-ri, Paltan-myeon,
- Taisin Co., Ltd.
- Address:#815 5BA,Seonggok-dong ,Danwon-gu, Ansan-si
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