Looking at the
Hitec HS-7945TH HV Multipurpose Titanium Coreless Servo
Tower Hobbies Hitec Hyperlink
Motor Type: Coreless (7.4V wind)
Bearing Type: Dual ball bearing
Speed: 6.0V, 0.12 sec/60°
7.4V, 0.10 sec/60°
Torque: 6.0V, 250 oz-in (18.0 kg-cm)
7.4V, 319 oz-in (23 kg-cm)
Size: 1.57 x 0.79 x 1.5" (39.88 x 20.07 x 38.10mm)
Weight: 2.40oz (68g)