Changzhou Andefu Gas Spring Co., Ltd. is a professional manufacturer marketing gas spring, founded in 1996. We mainly produce compression gas spring, lockable gas spring and free type gas spring, which are widely used in office chair, bar chair furniture, and tool box, etc. Currently, we have more than 200 experienced technical staff members. We can produce 600,000 pieces of gas springs per month. At present, our products have passed the United States BIFMA X 5.1 SGS Certificate, Germany TUV ...