D131MW 8.5mm, Ultra-Nano, Coreless, Metal Case, Low Profile, Wing Servo Overview:Featuring a low profile, machined aluminum case, high-efficiency coreless motor, and dual ball bearings, this competitively-priced servo is the most durable, longest lasting in its class. Its robust technology is perfect for pilots and drivers needing powerful torque in a nano package, and ideal for high performance, thin-wing aircraft and hand launch gliders. Backed with the ultra-performance and reliability synonymous with Hitec, the D131MW’s quality engineering, enduring power and precision will impress the most discerning of modelers. Features: Wide Operating Voltage: 3.5~8.4V 1~2-Cell LiPo Compatible Coreless Motor Durable Metal Gears All Aluminum Case Dual Ball Bearings High Response, High Resolution Circuitry Smart Sense Technology for Servo Analytics Full Programmability w/Hitec’s DPC11 or HFP-30 (sold separately) M25T Micro Output Spline