This is the Hitec HS-65HB Mighty Feather Micro Servo with Universal Futaba J, Hitec S, JR and Airtronics Z Connector.
This is the Hitec HS-646WP High Voltage Analog Waterproof Ultra Torque Servo.
The HS-55 sets the standard for affordable performance, offering precision components that have been engineered to provide long lasting trouble free service. The HS-55 is a great choice when it comes to controlling smaller electrics and Park Flyers.
A popular servo for smaller airplanes, heli’s, boats, cars and trucks, the HS-81 offers a fine balance between speed and torque.
Dual ball bearings. Digital and MOSFET amp programmable (see COMMENTS). Indirect drive potentiometer for long life. Narrow dead band width and high standing torque.