This is the HS-85MG Mighty Micro Metal-Geared Servo from Hitec. It has a universal connector so it will work with JR, Futaba, and the new style Airtronics. This produces 41.66 oz/in of torque at 4.8V, and 48.6 oz/in at 6V.
FEATURES: Lightweight and small; ideal for sailplane or weight-sensitive applicationsMetal gearsAluminum output gearShock protected POT
INCLUDES: One HS-85MG metal gear micro servoTwo screws, grommets and eyeletsTwo servo arms and one wheel
SPECS: L: 29mm x W: 13mm x H: 30mm (1.14" x 0.51" x 1.18")Transit: 0.16sec/60 deg (4.8V) 0.14sec/60 deg (6.0V)Torque @ 4.8V: 3.0kg/cm, (41.66 oz/in)@ 6.0V: 3.5kg/cm, (48.6 oz/in)Weight: 21.9g (0.77oz.)