Place of Origin: Shandong, China (Mainland) Brand Name: HUAMIN Model Number: Nonstandard Products Application: Mill,Cement Plant,Power Station,etc, Mine,Cement,Electric Power Plant,Chemical and other industries Material: Steel Dimensions: 20-150MM Diameter: Dia.20mm-Dia.150mm Surface Hardness: 55-67HRC Core Hardness: 45-63HRC Certification: ISO9001, ISO14001,ISO18001 Packaging: Steel Drum or Steel Barrel,Container Bag Drop Test Times: more than 2000 Impact Value: more than 15J/cm2 Raw Material: High-Quality Round steel Key words: Forged Steel Grinding Ball Packaging & Delivery Packaging Details Steel drum or Steel barrel  Container Bag Delivery Time 15days