These springs are made in the Netherlands out of special stainless steel. They are heat treated to improve the mechanical properties and increase lifetime.
The springs for our adjustable, single spring clap systems have 20 windings but are shorter than the 20w springs for the double spring clap system. Also the eye loops to mount the spring are in a different plane and not parallel. Make sure you order the right ones.
|Blade tube alloy||No|