Spring RC SM-S8467M 2BB Metal Gear Ultra Torque Digital 1/4 Scale HV Servo Torque: 6.0V: (409.69oz/in ) | 7.4V: (493.68oz/in) Speed: 0.27sec (6.0V) | 0.24 (7.4V) Operating Voltage: 6.0 - 7.4V Weight: 170g (6.01oz) Dimensions: 2.38 in (60.5mm) x 1.21 in (30.7mm) x 2.36 in (60mm)