5kits 022 1st molar monoblock single roth bonding n-conv buccal tubes 200pcs/kit. 4pcs/set, 50 sets, total 200 pcs / total 5 kits. Work with Orthodontic bracket brace, Orthodontic niti arch wires, orthodontic elastic chain, elastic bands.. These charges are on the buyers' responsibility. It is uncontrollable with us.All items are inspected for damage or defects prior to leaving our warehouse. If it is more than 2KG, I will send them separately. Without this information, the return won't be processed. Add: No95 Jinshui Road, Zhengzhou, HN, 450000, China.