... 20 days 5 MOQ:500 pieces Ⅰ.Spring 1 Material : Titanium, Carbon steel, Silver, Nylon, Cr5, Iron, Nickel plated ... zinc-plated, blue black zinc-plated, rust preventive oil, titanium alloy galvanized, silver plating, plastic, electroplating, anodizing etc3 ... features: A company with industry and trade integration6Main Products: Compression spring, Extension spring, Torsion spring ,Coil spring etc7 ...