1,no rebound when bending 2,strong holding ability 3,no noise when swing 4,easy to bend 5,ISO9001 ItemsSC-111MaterialSpring wires & galvanized iron wireOD2mm-30mmLengthcustomizedThreadsno threads or customizedSurfaceChromed,electrophoresis,baking finish etc.ColourSilver or blackDelivery time7daysPackingPlastic bag and cartonShipping termsDHL,UPS,TNT,EMS,FEDEX,etcPayment termsT/T,Western ...