- Zhangjiagang Matai Pipes Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Yanshan Yongguan Flanges Manumacturing Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Wuxi Double Hoese Drilling Tools Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Winner Stainless Steel Tube Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- Beijing Dong Fang Wu Hai International Trade Co.,Ltd
- Main business:
- Caribbean RegionBermuda
- King Xu Trading(Hongkong) Co.,Limited
- Main business:
- Caribbean RegionBermuda
- China Baofeng Steel Group
- Main business:
- Caribbean RegionBermuda
- Beijing Flourishing Technology Development Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Cner Advanced Material Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Zhangjiagang Liantai Machinery Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Shandong Buoy&Pipe Industry Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Hebei Hengtai Corporation
- Main business:
- Caribbean RegionBermuda
- Cixi Tongfeng Electrical Metal Flexible Conduit Factory
- Main business:
- Caribbean RegionBermuda
- Beijing Rubber-King Rubber Products Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Yingkou Zicn Pipe Fittings Manufacturing Co., Ltd
- Main business:
- Caribbean RegionBermuda
- Zhujicity Fuhong Rubber and Plastic Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Nantong Tongmao New Material Industrial & Trading Co., Ltd.
- Main business:
- Caribbean RegionBermuda
- Anhui Huge W.S.N. Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Toppipe International Supply Co.,Ltd.
- Main business:
- Caribbean RegionBermuda
- Huanghua Jinfubo Pipe&Fittings Co.,Ltd.
- Main business:
- Caribbean RegionBermuda