215mm(8.5") trampoline springs

Specifications

A.15 years casting experience
B.OEM & ODM service
C.CNC auto machine
D.Good price and quality
trampoline springs

 135mm,139.7mm,163.5mm 181mm, 215mm   trampoline spring

 

 

 What's production process for spring making?  

 

How to make Extension Spring as per your enquiries?

 Pls provide me main specification as follows

A. Material
B. Wire diameter(size of material)
C. Body Length
D. Length inside ends
E. Type of ends
F. Ouside diameter
G. Quantity
Or detailed drawing or real samples is very helpful
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