This product is made of photosensitive resin, non-injection molded parts. This product are 3D printed products, some models need to be simple bonding. Will not be “will not be assembled, assembly difficulties” as the reason for the return! All products may exist in the store, manual processing, or sanding removal of support traces and other unavoidable circumstances. Some parts may have molding failure, please contact customer service for replacement! So, my friend, please wait your item patiently. If you have any other. This date is not guaranteed and will continue to be updated as your item travels to its destination. Item location is at China, and we do cross air express. Please see below table to find details service level. We are a professional worldwide wholesale company. High product quality, reasonable prices, excellent customer service and a reliable credit standing is our tenet. Feedback is very important to us. Our work time for. We will do our best to solve your problem as soon as possible. Thank you for your visit and welcome back. We will reply you ASAP. If no response within 24 Hours, please check the spam in your maibox. Our aim is to provide Top Level Customer Service, normally so we will try our best to solve any problem.