2PCS Custom Extension Spring Pullback Coil Tension 3mm Wire 30mm Outer Diameter Length 100-300mm for Hardware And Tools

High-concerned chemical：None isCustomized：Yes Model Number：Extension Spring Load Type：Extension Style：COIL DIY Supplies：Metalworking Material：Spring Steel Origin：Mainland China Certification：NONE Use：Industrial Wire Diameter：3mm Out Diameter：30mm Free Length：100-300mm

High-concerned chemical: None isCustomized: Yes Model Number: Extension Spring Load Type: Extension Style: COIL DIY Supplies: Metalworking Material: Spring Steel Origin: Mainland China Certification: NONE Use: Industrial Wire Diameter: 3mm Out Diameter: 30mm Free Length: 100-300mm