This is a Hitec HS-81S Micro Servo with a Universal Futaba J, Hitec S, JR and Airtronics Z Connector. Connector is compatible with all modern receivers and wiring accessories Compact, Lightweight Design-Ideal for Electric Airplanes and Sailplanes Strong, Dependable Gear Train High Torque and High Speed Mounts with Two Screws One HS-81S Micro Servo with 6-3/4" connector wire. One 7/8"x7/8" X-shaped servo horn One 1-1/8" long straight servo horn Two brass eyelets Two mounting screws Two servo grommets One servo horn screw Radio system. Transit Speed: 0.11 sec/60° @ 4.8V 0.09 sec/60° @ 6.0V Output Torque: 36.10 oz-in @ 4.8V (2.6 kg-cm) 41.66 oz-in @ 6.0V (3 kg-cm) Length: 1.17" (29.8mm) Width: 0.47" (12mm) Height: 1.16" (29.6mm) Weight: 16.6g (0.58oz) Mounting holes on-center: 1.31"(33.27mm) baw 1/03/01 ir/jl updt jxs 2/14/06 &