The dimension of the bonnell spring is customized.

And the common specificaitons of single spring used are as below.

Wire Dia.	Top Dia.	Waist Dia.	Border Wire	Height	Turns
mm	cm	cm	mm	cm
1.8-2.4	6.5-9	4.5-5.5	4.8-5.0	6-23	4-8

Upon the customers offer us the detailed specification information,we can quote.And there are various sizes available.

All the springs will be heat treated.

We have two kinds of packing ways.

Roll packing----without the border wire

Flat packing----with the border wire

(With 10-20 pieces into one package)