Description

The design of this spring has been completely revised:
the carbon steel used is of even better quality.
It was also increased the diameter of the wire to obtain a greater safety margin: in this way the mechanical limit and that is the number of theoretical extensions of the spring, it is tripled.

NOTE: You will notice that the outer diameter of the spring is larger than the previous models and this makes it necessary to use the specific and suitable support bar (see related items).