... 3.Finish;zinc plated 4.OEM available 5.ISO9001:2000 Mechanical spring1.Specification:M2*702.Material:alloy steel,iron,common steel3 ... ,zinc plated,black,color4.MOQ:1000pcsPackaging & Delivery details1.Packaging: polly bag,small box,carton/according to customers' requirements2.Trade terms:FOBxiamen3 ... .,Ltd ,Shanghai Hadiwei Fasteners Co.,Ltd ,Shanghai XiajuanFasteners Co.,Ltd mechanical spring