We can do all various kinds of the auto springs,no matter what size you want. Furun Springs are the Zhuji, Zhejiang ,China' leading compression, extension and torsion spring manufacturers and auto spring suppliers.My company is a Sino-America joint venture,with YPAYMORE in the USA,specialized in springs and hardware fittings1). Material: stainless steel, steel, etc.2). Finish: black oxide, zinc/ ...