This is a 2.5x6mm x 1m Ultimate Racing silicone fuel tube. This ultra-thick fuel tube is the ideal choice for almost all Nitro racing applications. Made from a special heat-resistant silicone, this tube is soft enough to bend in tight areas while remaining firm enough to withstand the bends. With an outer diameter of 6mm, this tube fits perfectly in fuel tanks. It has been tested and trusted by many national and European champions.