This is the HS-5495BH High Torque, High Voltage Servo from Hitec.

FEATURES: Designed to be powered from a 2-cell 7.4V LiPo battery for extra speed and power Ideal for 20-1.20 class aircraft, EP 600-700 and GP 30-90 size helicopters, 1/10-1/4 scale car steering and throttle and EP and Gasoline powered boats Programmable features include; Dead Band Width, Rotation Direction, Rotation Speed, End Points/Neutral Points, Fail Safe On/Off, Fail Safe Point, (requires Hitec programmer HFP20, HPP20 or HPP21 HRCM4420) Karbonite gear train - four times stronger than conventional white resin gears

INCLUDES: HS-5495BH High Torque, High Volt Servo with Connector 0.94" (24mm) round horn, 1.8" (45mm) round horn, 1.7 (44mm) 4- point horn, 0.98" (25mm) single arm horn, 2.3" (59mm) double arm horn, mounting hardware and instruction sheet instruction sheet

REQUIRES: Installing in model and connecting linkage

SPECS: Speed: 6.0V, 0.17 sec/60° 7.4V, 0.15 sec/60° Torque: 6.0V, 88 oz-in (6.4 kg-cm) 7.4V, 104 oz-in (7.5 kg-cm) Size: 1.57 x 0.78 x 1.49" (39.8 x 19.8 x 38mm) Weight: 1.59oz (45g)  

BOX DIMENSIONS: 2.00" W. X 1.88" H. X 2.50" L. BOX WEIGHT: .17 LBS.