We can produce the sofa springs as follow:
Dia of wire: 2.1mm -- 4.2mm
Height: 30mm -- 50mm
Length: Can be in coil or cut in sizes

Material: High carbon steel
Packing: Put in carton / with Polythene bag
We can offer them to you according to your detailed specification information. And we'll quote you the most favourable prices ASAP upon receiving your inquiry.