This refurbished product has been professionally inspected and thoroughly cleaned by a Creality certified engineer. Each component has been carefully checked to ensure optimal performance. You may notice some material residue on the extruder, indicating manual functional testing. The machine may also have minor scratches and signs of use. These are normal aspects of our rigorous quality verification process. All functions are in good working. The packaging of this product may differ from the original retail box, but it remains secure and reliable. This product meets Creality's stringent refurbishment standards, offers excellent value, and is guaranteed to be fully functional.