Raw Material: As we know, the quality of forged grinding piece depends on the material by 80%. Our products use high-quality round steel from national large-scale steel mill to insure the quality of our products. Description and Advantages: Nearly 30 years, Shandong Huamin Steel Ball Joint-Stock Co., Ltd has always been a professional manufacture of grinding media,and a pioneer especially in forged steel balls. Even hardness, low breakage rate, low wear are the greatest advantages. Forged Grinding Ball Products Show: Our products range from 20mm to 150mm, 1 inch to 6 inch, and we can also offer all size of products according to clients'demand. Packing Instruction: Steel Drum (Volume: 800kg-900kg N.G. avaliable) Big Big ( Volume: 1000kg N.G. avaliable) Company and Factory: In the Eastern Industry Park of Zhangqiu City Economic Development Zone, it is 50 KM to the east of Jinan Airport. Application: Humin steel grinding ball is widely used in all kinds of mine(gold, copper, iron, molybdenum, lead, zinc ), electric power plant, chemical plant and other industries. Certification and Patent: Our company has obtained ISO 9001 International Quality System Authentication, ISO14001 Environmental System Management Authentication and OHSAS18001 occupational health and safety certification, safety standardization identification, clean production enterprise http://www.huaminsteelball.com/grinding_balls/forged_grinding_balls.html