Specifications

feature:
1) diameter: 3.94mm
2) material : carbon steel

 

Features:
1) Diameter: 3.94mm
2) Materials: carbon steel .65Mn(ASTM 1566) 70# (ASTM 1070)
3) Mainly used in automat machine .there are 17 kinds of springs in total   
4) All of high quality

5) the surface is zinc

Packing: wooden boxes