4 x Howes Super Mini Servo 1160a. This is our own version of the Hitec HS81 Servo. Small in size but very powerfull, comes fitted with futaba/hitec style plug and a very comprehensive accessory/fittings kit. Specification Torque(4.8V): 2.7 kg-cm (37.5 oz/in) Torque(6.0V): 3.0 kg-cm (41.7 oz/in) Speed: 0.14 sec (4.8V) │ 0.12 sec (6.0V) Operating Voltage:4.8 ~ 6.0 DC Volts Weight: 16.0 g (0.56 oz) Bearing Type:no Motor Type:DC Motor Gear Type:Plastic Operating Temperature:-20℃~60℃ Size:28.0 x 13.2 x 30.2 mm ( 1.10 x 0.52 x 1.19 in)