We started a project using their motors, after having created the final product we asked for the motors' certifications, only then did they reply that their products are not certified. I believe that a lack of this type should be made clear first to all customers who ask for information. You can't answer "you didn't ask" because certification is the basis of every product, if it isn't there it must be said immediately and the customer chooses what to do.

1. rpm is correct 2. connect pin size is different 3. shaft neck size is too big -cannot attach 4. moter body is not covered all -air hole is too big 5. shipping cost too expensive also too late -slower then china post service but more than 40 bucks