Wire Diameter 4mm/4.5mm Expansion Springs Extension Tension Spring Outer Dia 22mm/25mm/30mm/30.5mm/35mm Length 80mm-280mm

High-concerned chemical：None isCustomized：Yes Model Number：4mm/4.5mm Load Type：Extension Style：COIL DIY Supplies：Metalworking Material：STEEL Brand Name：lialaws Origin：Mainland China Specification：8x4.2x0.4mm Certification：CE Use：Industrial

High-concerned chemical: None isCustomized: Yes Model Number: 4mm/4.5mm Load Type: Extension Style: COIL DIY Supplies: Metalworking Material: STEEL Brand Name: lialaws Origin: Mainland China Specification: 8x4.2x0.4mm Certification: CE Use: Industrial