5ZIGEN is at a breakthrough point where we can take informative feedback from professional users and have the ability to research and develop high quality products to the end users. All stainless steel body with INCONEL used for the tailend. Inconel is a nickel base material use also used in the top race category Formula One. This is extremely heat resistant, more than titanium, which is why it is used not only in Formula One, but in aeronautics as well. No limitation with the PRORACER A-SPEC system.