Biconical coil spring for sofa

Our product gains many customer's recognition and appraise.Distribute great quality,durability ,and utility to sofa and seat.

Sofa seat spring details:

1. Material: high carbon steel 

2. Wire diameter: 3.0mm - 4.1mm

3. Outside diameter: 80mm- 130mm

4. Inside diameter: 40mm-60mm

5. Number of turns : 4-9 turns

6. Height: 100mm-150mm

7. Payment: by T/T, L/C

8. Port: Shen zhen

9. Packing: in knitting bag, usually 200-300pcs/bag

10. Delivery: 15 days after receiving deposit