ERA Mining Machinery Limited, formerly ERA Holdings Global Limited, is a Hong Kong-based company. Hong Kong Siwei Holdings Limited is the subsidiary of the Company and Zhengzhou Siwei Mechanical & Electrical Equipment Manufacturing Co., Ltd is subsidiary of Siwei Holdings Limited. Zhengzhou Siwei鈥檚 products are hydraulic roof supports and related equipments for the underground coal mining industry. Zhengzhou Siwei designs and manufactures a range of shields ranging from 0.8 meters to 6.5 meters in height and from 1,800 KN to 18,000 KN in terms of working resistance. All shields delivered are custom manufactured to the mining requirements of each customer. During the fiscal year ended June 30, 2010, Zhengzhou Siwei introduced products in areas, such as large height mine faces, caving supports with large yield loads, ultrathin seam mining supports and large dip angle face supports. On September 30, 2010, it acquired Hong Kong Siwei Holdings Limited and its subsidiary, Zhengzhou Siwei.