This is the E-Flite 7.5 Gram DS75 Digital Sub-Micro Helicopter Servo
Specifications:Size Category: Minis and MicrosType: DigitalTorque: 17.2 oz/in (1.17 kg. cm) @ 4.8VSpeed: .11 sec/60 deg @ 4.8VDimensions (WxLxH): .45 x .90 x .94 in (12 x 23 x 24mm)Weight: .26 oz (7.5 g)Bushing Or Bearing: BushingMotor Type: CorelessConnector Type: UniversalGear Type: NylonApplication: Micro and mini electric helicopters