Length: 10cm (100mm) (can be adjusted ±5mm based on design).
Material: High-carbon steel (65Mn/70#) or stainless steel (SUS304 for rust resistance).
Wire Diameter: 1.5mm–4mm (thicker wire = higher tension).
Outer Diameter: 15mm–50mm (depends on sofa mechanism).
End Types: Closed loops, hooks, or custom bends.
Load Capacity: 5kg–50kg per spring (specify your requirement).
Finish: Zinc-plated, powder-coated, or galvanized for durability.