Designed with hardened 416 stainless steel gears, and a custom 4 pole brushless motor, the RS650 is the highest performing low profile 8.4v servo on the market. The RS650 is built with the highest quality parts, designed for the performance demands of competition level RC. One of the most notable features of our RS650 servo is our industry leading 5 gear 4 pole gear train design. With the reduction of the 5 gears, durability and precision have been greatly increased over the standard 4 gear design. The compact, low profile design saves you weight and space without sacrificing performance.