From Hudy come these precision machined 15g pure tungsten under receiver & 20g pure tungsten under speedo weights. The weight is very thin to keep the lowest possible CG comparing to standard weights and is specially designed to be placed under both receiver and ESC. Produced from very rare and heavy pure tungsten material, not a typical tungsten mixture, it has the highest density structure and is the heaviest metal material which allows to design the smallest size weights comparing to any other materials. Quick & easy attachment to chassis. Marked with weight value for easy identification.