Hello, We are looking for a Charm producer in mainland of China for our client. We need 15000 pieces with 3 different logos, 5000 pieces eacn logo. Attach the picture to explain the pattern and measurement of this charm. It's made of metal and elastic rope. 1.4 CM crimp 2 CM diameter 1 MM thickness metal disc Please note the back , numbers of each piece will be changed . If you have serial engraving machine or this kind of technology, please contact us. please reply to and you can also use Chinese. Thank you !