เซอร์โว Towerpro MG90D Specifications: Dimensions (L x W x H) = 0.89 x 0.48 x 1.10 inch (22.5 x 12.2 x 28.1mm) Weight = 0.49 ounces (14 grams) Weight with wire and connecter = 0.52 ounce (14.7 grams) Bearings: top and bottom ball bearing Operating Voltage = 4.8 to 6.0 volts Stall Torque at 4.8 volts = 29.1 oz/in (2.1 kg/cm) Operating Speed at 4.8 volts (no load) = 0.13 sec/ 60 degrees Stall Torque at 6.0 volts = 34.7 oz/in (2.5 kg/cm) Operating Speed at 6.0 volts (no load) = 0.11 sec/ 60 degrees Connector Wire Length = 6 inches (152 mm) Universal "S" type connector fits most receivers