We can produce all kinds of spring for embroidery machine,can offer you samples free after you accept our price. Furun Springs are the Zhuji, Zhejiang ,China' leading compression, extension and torsion spring manufacturers and spring for embroidery spring suppliers.1). Material: stainless steel, steel, etc.2). Finish: black oxide, zinc/nickel/chrome plating, power coating, passivate, oiled to ...