Spring RC SE-C4407V Metal Gear 2BB Ultra Speed Digital High Torque HV Servo Torque: 6.0V: (74.99oz/in ) | 6.0V: (97.21oz/in) Speed: 0.08sec (6.0V) | 0.06(7.4V) Operating Voltage: 6.0 - 7.4V Weight: 33.4g (1.23oz) Dimensions: 1.57 in (40mm) x 0.79 in (20mm) x 1.46 in (37.1mm)