To meet the customers' over-expected satisfaction , we have our strong team to provide our best overall service which includes marketing, sales, designing, production, quality controlling, packing, warehousing and logistics for 4 Inch Grinding Ball, Grinding Media Ball, Grinding Balls For Ball Mill, Drop Test Times,Ball Milling Is. Welcome to visit us at any time for business relationship established. The product will supply to all over the world, such as Europe, America, Australia,Greece, Canada,Durban, Bulgaria.We set a strict quality control system. We have return and exchange policy, and you can exchange within 7 days after receive the wigs if it is in new station and we service repairing free for our products. Please feel free to contact us for further information if you have any questions. We are glad to work for every client.