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We have a very professional customer service team. We will try our best to solve problems for you. Better customer experience and satisfaction is our aim. From 9:00 to 17:30(Beijing time) on Mondays to Fridays. 20-30 days to UK, Germany, French, Australia, Canada, etc, Over 30 days to other countries. Our guarantee does not cover accidental damage or wear of product caused by customer. Thank you very much for your understanding! We're one of the largest online dental suppliers based on many qualified manufacturers in china. Looking forward to our friendly & win-win cooperation!