1.Compression spring 2.ISO9001 certificate 3.High quality and reasonable price 4.Produce with your drawings and sampls Hot-selling and best price Compression springs SpecificationsWire diameter:0.1mmFree length:5.1mmSmall outer diameter:1.8mmBig outter diameter:2.4mmNumbr of coils:16materialcarbon steel,alloy spring steel,music wire steel,and stainless steel,iron,plated steel,alloy steel,bronze, ...