1,strong flexibility 2,strong holding ability, 3,no noise when swing 4,color won't change 5,look nice medical equipement gooseneck ItemsSC-006MaterialSpring wires & galvanized iron wire or customizedLengthCustomizedPackingPlastic bag and cartonSurfaceSilver plating,chromeplate,electrophoresis,baking finish etc.ColourAccording to your requestLogoOEM is okSizeOD 2mm-30mmDelivery timeWithin 7-15 ...