This is the Ace R/C DS1213 Digital Standard Servo. FEATURES: Can be used for a wide variety of applications ranging from 1/8 scale racing, airplanes up to 40%, 90 size helis and large racing yachts Advanced microprocessor that can process signals faster and with more procesion Metal gears Aluminum heat sink mid case to dissipate heat build-up for fade-free performance Water and dust resistant Universal connector Coreless motor Eight screws for solid construction Single and twin ball screws for output shaft reinforcement INCLUDES: One DS1213 Servo One straight arm servo horn (43.5mm) Four brass eyelets Four rubber grommets Four mounting screws SPECS: Length: 1.65" (42mm) Width: 0.81" (21mm) Height: 1.56" (40mm) Weight: 2.33 oz (66g) Speed: 0.16 sec/60° @ 4.8V 0.13 sec/60° @ 6.0V Torque: 133 oz-in @ 4.8V 174 oz-in @ 4.8V Operating Voltage: 4.8-6.0V JAW 2/3/11 ir/jxs