This is a modified GWS05 servo from GrandWing Servo. It’s a servo body with servo gears but with continuous rotation and no electronics. This a gear motor in a clear servocase. No circuit board means you get a robust servoshaped motor.

Each motor comes with a standard servo accessory pack. Description:

• Servo Body style Motor (requires an HBridge Driver)
• Gear Ratio: 325.10:1
• Plastic Gear Train
• At 3 Volts
  Unloaded RPM (3V): 67
• Unloaded Current (3V): 64 mA
• Stall Current (3V): 322 mA
• Stall Torque (3V): 35.12 in*oz
  At 6 Volts
• Unloaded RPM (6V): 77
• Unloaded Current (6V): 93 mA
• Stall Current (6V): 529 mA
• Stall Torque (6V): 50.94 in*oz
• Measurements: 1.83 x 2.18 x 0.79 (46.6mm x 55.4mm x 20.0mm)
• Weight: 1.35oz (38.4g)