Set up years ago, W&J is a professional manufacturer and also a supplier with strong capabilities in production, design, and R&D. scale calibration weights We have professional employees who have years of experience in the industry. It is them that provides high-quality services for customers all over the world. If you have any questions about our new product scale calibration weights or want to know more about our company, feel free to contact us. Our professionals would love to help you at any time.This product has electromagnetic compatibility. The electromagnetic interference it generates does not exceed the level that allows radio and telecommunication equipment and other equipment to operate as intended.