The design of thisspringhas been completely revised: thecarbon steelusedisofeven better quality. It was alsoincreased thediameter of the wireto obtain agreater safety margin:in this waythemechanical limitandthat is the numberof theoreticalextensionsof the spring,itistripled.
NOTE:You will noticethat the outer diameterof the spring islarger than theprevious modelsand thismakes itnecessary to use the specific and suitablesupport bar(seerelated items).