This is the Hitec HS-225BB Mighty Mini Servo 0.14S/3.9kg/27G

This is the HS-225BB Ball Bearing, Hi-Speed, Hi-Torque Servo from Hitec. The HS-225BB is ideal for applications that call for a small lightweight, high speed, high torque servo. Using state-of-the-art SMT technology, and a custom designed IC the HS-225 series of servos represent a true value with the performance that rivals the others larger more expensive servo.

Specifications:

• Speed:
• 4.8V: 0.14 sec/60 deg.
• 6.0V: 0.11 sec/60 deg.
• Torque:
• 4.8V: 54.15 oz/in
• 6.0V: 66.65 oz/in
• Length: 1.28in (32.4mm)
• Width: 0.66in (16.8mm)
• Height: 1.22in (31mm)
• Weight: 0.95oz (27g)