This is the HS-225MG Precision Mini Servo from Hitec.
This version has the Universal S/Z/JR, Futaba J Connector.
Connector is compatible with all modern receivers and wiring accessories.
Lightweight and small; ideal for sailplane or weight-sensitive
One HS-225MGS metal gear micro servo
Four screws, grommets, and eyelets
Three servo arms and one wheel
L: 32.4mm x W: 16.8mm x H: 30.8mm (1.27" x 0.66" x 1.21")
Transit: 0.14sec/60? (4.8V) 0.11sec/60? (6.0V)
Torque @ 4.8V: 3.9 kg-cm, (54.2 oz-in)
@ 6.0V: 4.8 kg-cm, (66.7 oz-in)
Weight: 31g (1.09oz)