... dia.: 0.08mm -- 10.0mm 3.Free Sample is available Door extension/tension springFeature:1.Spec: wire dia. Range: 0.08mm ... .Usage: Widely used on hardware,auomobile,machine,toy,furniture,apparatus,electrical equipmen,tfitness equipment,meter ect.7.Package: general packing:inner ... .If anything can help you ,pls let me know,tks ! Door extension/tension spring