This is the Futaba BLS155 Aircraft High Torque Brushless Servo. FEATURES: Designed for aircraft applications requiring high torque Standard size Equipped with metal gears and two ball bearings 30% faster response than standard digital servos and five times longer lasting than servos with brushed motors Same power consumption as brushed digital servos One year limited warranty INCLUDES: Futaba BLS155 Brushless Aircraft High Torque Servo with universal connector, (21mm) diameter round horn, 1.8" (45mm) diameter round horn 1.2" (32mm) diameter 6-point horn, 1.5" (38.8mm) diameter 4- point horn, mounting screws, eyelets and grommets REQUIRES: Installing in aircraft, connecting linkage and connecting to receiver SPECS: Torque: 200 oz-in (14.4 kg/cm) @ 4.8V 250 oz-in (18.0 kg/cm) @ 6.0V Speed: 0.19 sec/60¢X @ 4.8V 0.15 sec/60¢X @ 6.0V Size: 1.60 x 0.80 x 1.50" (40 x 20 x 36.8mm) Weight: 2.30 oz (64g) ¡@