This is the Reefs RC Brass 99micro High Torque Digital Micro High Voltage Servo. Built on the beloved 99micro with an all CNC-machined water-resistant brass casing. Features a CNC-machined heavy brass case that provides excellent heat dissipation and adds 36g of total unsprung weight for axle mounted servo applications, a high-efficiency digital coreless motor with all metal gears that ensure supreme durability against the harshest conditions! Designed and specified to suit and feed the demand for water-resistant, high-torque, brass cased micro servos in the micro crawling scene! Get the 99micro Brass edition to elevate your micro crawler performance and experience the mighty power of this micro servo!