Normal/Soft/Very Soft start-up modes are compatible with regular propeller airplanes and EDF jet airplanes

Heavy duty CNC machined #45 hardened carbon steel construction

One (1) left aluminum axle carrier with with carbon fiber link mounts

Motor mount holes to accommodate many different sized motors

RPM's version is more that 15% lighter than stock

Power Hobby - 300BW Waterproof Brushless High Speed Torque Digital Servo KYO30618C Normal/Soft/Very Soft start-up modes arePerfect for scale crawlers, 1 8 1 10 monster truck, 1 8 1 10 2WD and 4WD buggies, as well as 1 8 scale buggies and trucks. In addition, this servo is a great choice for boats and other application which require high power, high voltage, and waterproof. Waterproof IP67 level up to 1 meter, which allow driving in rain, puddles, snow, and mud. Highly reliable and durable patented gear design. Aluminum middle case for fast heat dissipation. High precision