Weight: 4.7 oz (117 g), Dimensions: 2.3 x 1.1 x 2.0 inches (59 x 29 x 50 mm), Torque (4.8 v/6.0 v): 12.0 / 14.4 kg, Speed (4.8 v/6.0 v): .28 / .23 sec sec x 60 inches (.0 x 60 ° x 60 x 60 x 60 cm); *Analog servo, metal gear.

(From Amazon.co.jp)
Hitec's expansive line-up of servos include the HS-755HB and HS-755MG “giant scale” servos offered with either the revolutionary Karbonite™ gears or metal gears. Both are perfect for larger R/C applications and feature dual ball bearings with a water and dust resistant case. The powerful HS-755MG delivers a whopping 200 oz./in. of torque and the HS-755HB delivers 183 oz./in. of torque at 6 volts.