Spring Electronics was start work in year 2012.We are professional China USB Extension Cable Suppliers and China USB Extension Cable manufacturers,We are consist of three factories and one import & export company. One factory doing research and manufacture CATV / fiber optic cable system equipment, one factory manufacturing LED Products, one factory manufacturing components & accessories. All factories are ISO:9001 certified,Since founded, Spring is committed to supply high quality USB Extension Cable for our clients.Under strict inside and outside QC system, lead us as a flag of quality. Ensure our clients use our USB Extension Cable worry-free. Then fasten ties built in years cooperation, also the long-term friendship !