Before mass production, we will make a sample first, if you are satisfied with the sample, the factory will make it according to the sample, after mass production, when it arrives at our warehouse, we can check it again according to your requirements, so the satisfaction rate is more than 95%. Of course, if you have special requirements, you must tell us in advance, we can deal with it together with the factory. The conclusion is that you must think about your requirements and tell us well to avoid any problems.