... 10-20 days 5 MOQ:500 pieces Ⅰ.Spring 1 Material : Titanium, Carbon steel, Silver ... spring, Extension spring, Torsion spring ,Coil spring etc7 Producing Equipment:Spring machine Jinju & 502S(Spring coiling machine, Pressure spring machine, CNC computer spring omnipotent machine, grinding machine,automatic spring ... sus304/316 spring clips/clamps and compression/pression spring in dongguan guangdong china