... manufacturer 1>Various specification and material 2>OEM and ODM 3>EXW price & strictly quality control Steel drum spring manufacturerFeatures: 1) Wire Diameter: 0 ... .08~ 10.0mm 2) Type: compression drum spring. 3) Main material: carbon spring steel, alloy spring steel, refractory, music ... industrial spring, car/vehicle spring, auto spring, machine spring,wire spring, coiled spring, cylinder spring, ...