| Place of Origin |
Shandong China (Mainland) |
| Brand Name |
HengFu |
| Model Number |
superflex |
| Style |
Coil |
| Load Type |
Compression |
| Material |
Steel |
| Usage |
Furniture |
bonnell spring used for springmattress.many sizeas your choose. Mechanical Compositon:C:0.65 Mn:0.61 Si:0.17 S:(max.0.008 P(max.)0.015 Tensile Strength( N/mm2):1660 1960 Twist Times:26 28 Spring Turn:4 6 External Spring(Ø):60 90mm Middle Spring(Ø):30 57mm Elongation:hard Packing on pellets:it will be packed for by sea shipping.