0.4x4mm Small Compression Spring, 10/20/50Pcs Precision Pen Core Return Spring

High-concerned chemical：None Model Number：4mm Load Type：Compression Style：COIL DIY Supplies：Metalworking Material：STEEL Origin：Mainland China Certification：NONE

High-concerned chemical: None Model Number: 4mm Load Type: Compression Style: COIL DIY Supplies: Metalworking Material: STEEL Origin: Mainland China Certification: NONE