Opening Hook Stretching and Pulling Back Coil Spring Steel Diameter：1.0mm,1.5mm ,2.0mm ,Outer Diameter: 10mm 12mm 15mm 20mm

Opening Hook Stretching and Pulling Back Coil Spring Steel Diameter：1.0mm,1.5mm ,2.0mm ,Outer Diameter: 10mm 12mm 15mm 20mm

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