●Uses the worlds highest grade material (our own development) with a tensile strength of 48.6 lbf/ mm2, which increases the stroke and makes it ultra light. Compatible with vehicle inspection. ● Spring rate is up to 15-20% of the original product. Ride-On Nearly unsightly hair. Lifetime Warranty Compatible with all car manufacturers 2000 and above. Down amount guaranteed. First in the industry Uses environmentally friendly paint. First in the industry