This is the Tower Hobbies Standard Digital TS-150 High Torque Servo with Metal Gears and Dual Ball Bearings with Universal Connector. FEATURES: For glow or electric powered helicopters, cars, boats and .20-1.20 size airplanes which require very high torque Standard size Digital servo has dual ball bearings and strong metal gears which can easily handle the torque it delivers Rugged metal gear train for minimal backlash Digital circuitry provides strong holding torque and stable operation INCLUDES: Tower Hobbies Standard Digital High Torque Servo with Metal Gears, Dual Ball Bearings and Universal connector compatible with Futaba J, Airtronics Z, Hitec S and JR systems, 0.94" (24mm) diameter round horn, 1.4" (37mm) double sided horn, 0.94" (24mm) single sided horn, 1.2" (31mm) star shaped horn and mounting hardware REQUIRES: Installing in model and connecting to linkage and receiver SPECS: 4.8V 6.0V Speed: 0.26 sec @ 60° 0.21 sec @ 60° Torque: 162 oz-in (11.7 kg/cm) 193 oz-in (14 kg/cm) Length: 1.6" (41mm) Width: 0.8" (20mm) Height: 1.5" (38mm) Weight: 1.9oz (53g) Connector: Universal Spline- 25 COMMENTS: The following parts are available, Gear Set (HCAM1312) and Accessory Bag (HCAM1512). Case Sets and Horn Screws are not available. Must use OEM servo horns. No after market horns will work. jxs 10/26/06 ir/jxs updated jpg 5/19/08 updated jpg 5/13/10