This is the Arrma ADS-15M waterproof metal gear V2 steering servo.
Features:
Includes: Arrma ADS-15M Servo with Futaba style Connector 1.2 (32mm) diameter, 6-Point Horn 1.5 (39mm) diameter, 4-Point Horn 1.5 (39mm), Double Arm Horn 0.83 (21mm), Round Horn, four each Screws, Grommets and Eyelets
Specs:
Torque: 208oz/in (15kg/cm) @ 7.2V
4.8V Speed: 0.16 sec
6V Speed: 0.14 sec
Dimensions: 1.6x1.5x0.79 (40x38x20mm)
Weight: 1.4oz (40g) without horn attached
Wire Length: 11.8 (300mm)
Signal: Analog
Spline: 25 tooth