... dia. Range: 0.08mm -- 3.6mm 2. Spring Quality:ISO90001&ISO14001 3. OEM, ODM accepted Automobile tension springFeature: ... acceptedO.D.: mmI.D.: mmFree Length: mmTotal Coil: Direction of Coiling: 2.Material:Spring steel,stainless steel,zinc plating steel,etc.3 ... life,good quality.6.Usage:Widely used on hardware,auomobile,machine,toy,furniture,apparatus,electrical equipmen,tfitness equipment,meter ect.7 ...