Dongguan caiyin Hardware Spring Co., Ltd. was founded in 2013, Our main products are flat coil springs including constant force springs, power springs, constant torque springs, spiral springs, variable force springs etc.  We are a manufacturer with the advanced equipments, competitive price, providing the  valued quality and having strict quality system to meet our customers' standard.
With a decade development, we have more than 30 sets of machines to produce different series for our clients to meet their various requirements.