Hitec’s HS-45HB offers the economy and durability of our other famous micro servos, but now with a ball bearing supported output shaft and Karbonite gears. 

Motor Type: 3 Pole
Bearing Type: Top Ball Bearing
Speed: 0.14 / 0.12 sec @ 60 deg.
 English Metric
Torque: 13.88 / 16.66 oz.in (4.8v/6v) 1.0 / 1.2 kg.cm
Size: 0.92" x 0.38" x 0.88" 23.60 x 9.80 x 22.40mm
Weight: 0.28oz 8.00g
Full Spec sheet here:-
http://www.hitecrcd.com/servos/show?name=HS-45HB