Coil  Spring for Sofa

Feathers:

1.Material:  High carbon steel wire :82#

2. Wire diameter: 3.0mm- 4.3mm

3. Caliber.: 80mm-130mm

4.Heart diameter.: 40mm-60mm

5. Height: 100mm-150mm

6. Turn: 4-9 turns

7. Process:  high temperature treatment and antirust treatment.

8. Package: packed in fibre bag

9. Application: used for sofa or chair.

10. Quantity: up to customers' request.

11. Advantage: keep Stronger and Elastic