This is the HS-65MG Mighty Feather metal-geared servo from Hitec. This version of the servo has a universal connector which will fit Airtronics, JR, Hitec and Futaba receivers (be careful with the polarity of the connector for Futaba radios).

Specifications:

• Speed:
• 4.8V: 0.14 sec/60 deg.
• 6.0V: 0.11 sec/60 deg.
• Torque:
• 4.8V: 24.99 oz/in
• 6.0V: 30.55 oz/in
• Length: 0.93in (23.6mm)
• Width: 0.46in (11.6mm)
• Height: 0.94in (24mm)
• Weight: 0.44oz (12.5g)