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 applications
Metal gears
Aluminum output gear
Shock protected POT

INCLUDES: One HS-85MG metal gear micro servo
Two screws, grommets and eyelets
Two 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.)