A servo commonly used for 450 class helicopters, but it is also popular on airplanes. Digital servo with metal gear specifications. Made in Taiwan. Specifications: Suitable voltage: 4.8 V - 6 V. Speed: 0.09 sec (at 6 V). Torque: 5.9 lbs (2.2 kg) (at 6V). Speed: 0.13 sec lbs (4.8 kg) / cm) (at 4.8 kg). Weight: 14g Size: L= 22.8mm x H=25.4mm x W=12.0mm Gear: Metal Body: Aluminum heatsink specifications