Shaz-zam (google is your friend):
http://www.espritmodel.com/browsepro...ba-BLS351.HTML
Servo Futaba BLS351
Manufacturer Futaba
Applications Heli/Airplanes
Type Brushless High Torque
Torque 4.8V 168 oz/in (12 kg/cm)
Torque 6.0V 210 oz/in (15 kg/cm)
Speed 4.8V 0.16 sec/60 degrees
Speed 6.0V 0.13 sec/60 degrees
Dimensions 41mm x 38mm x 20mm
Weight 62g
Bearings Dual Ball Bearing
Gear Type Metal