In November 2020, we changed our product configuration in order to help customers' factory machines. Since the customer's factory is a fully automatic filling machine, we found that the matching diameter of our sample was slightly smaller after it was put on the machine, and the machine could not be tightened to the most tight state. After feedback from the customer and our factory, the technical department decided to adjust the mold slightly to fit the customer's machine after study. The customer was extremely satisfied.