It’s very important to compare before purchase the constant force spring online. Now there are too many constant force springs on the internet, in different constant force spring factories, the quality, productive technology and raw-material are all different. So if you purchase constant force spring, you need shop around. The smart buyer Ms. Chen said,  no matter the distance, they must choose Yongsheng Spring. Just like Yixie Mechanical and Electric Company, they compared so many springs, at last they choose Yongsheng.
        

Dongguan Yongsheng is a manufacturer which specializes in R&D and production of constant force spring and power spring for 16 years, and provide service for more than 5000 clients, and some are world top 500 enterprises. High quality, timely delivery,  sophisticated technology and best service are the reasons why so many people choose Yongsheng.