High-Performance Digital Micro Servo High Precision Metal Gears High-Quality Coreless Motor Dual Ball Bearing Full CNC Aluminium Housing Ideal for 1/24 Scale RC Monster Car, SCX10.3,RYFT, Airplane, and 450 Class Helicopter Tail and Swashplate, etc. Specifications: Operating Voltage: 4.8-8.4V Operating speed: 0.13sec/60@ 4.8V Operating speed: 0.11sec/60@ 6.0V Operating speed: 0.09sec/60@ 7.4V Stall Torque: 5.0 kg-cm (70 oz-in) @ 4.8V Stall Torque: 5.8 kg-cm (80 oz-in) @ 6.0V Stall Torque: 6.8 kg-cm (95 oz-in) @ 7.4V Gear: Steel + Titanium Motor:CLS Size: 23*12*27.5mm (0.90 x 0.47 x 1.08 in) Weight: 20g