Hangzhou Spring Co., Ltd., founded in 1958 (formerly Hangzhou Spring Factory), has over 60 years of experience in spring manufacturing. As a vice president unit of the China Spring Association, a National High-Tech Enterprise, and a “Specialized, Refined, Distinctive, and Innovative” Little Giant Enterprise, the company specializes in engine valve springs, hydraulic springs, and hot-coiled springs, widely used in auto vehicles, rail transit, construction machinery, military, and aerospace industries.