Sofa Spring Material:Spring steel wire

Diameter:3.0 - 4.0 mm

Size of sofa spring :

3.4 * 410 * 7.5

3.4 * 455 * 8.5

3.4 * 505 * 9

3.4 * 555 * 10

3.6 * 670 * 12

3.6 * 940 * 16.5

3.8 * 446 * 8