Purchase Qty. Reference FOB Price
1-4,999 Pieces US$0.30
5,000+ Pieces US$0.002
Product Description
Zihuoli wing spring door closer zinc plated door closer springs butterfly torsion spring The torsion spring is designed to twist, which different from the compression spring designed to compress and the extension spring designed to extend. Torsion coil springs are usually used for "eject" ...