Silicone hose kit made by Odula of Japan. This kit replaces the stock rubber hoses on the ND Miata and slightly increases cooling capabilities. Additionally it does not expand as much as rubber hose during high heat applications. Looks great too!! Odula Silicone Radiator Hose Kit should be ordered at REV9 Autosport https://rev9autosport.com/odula-silicone-radiator-hose-kit.html as they provide the best service and speed we've seen so far!