This is the Hitec HS-125MG Thin Metal Gear Wing Servo with a Universal Connector.

Overview:

• The analog HS-125MG is truly a super thin servo measuring 1.2” x 0.4” x 1.3”. Featuring Hitec’s MP Gear, the HS-125MG is very durable, and a perfect fit in the slim wings of today’s high performance gliders.

Features:

• Super Thin Wing Servo
• Strong Metal Gears
• Dual Ball Bearings
• Perfectly Designed to Fit in Slim Aircraft and Glider Wings

Specifications:

• Motor Type: 3 Pole
• Bearing Type: Dual Ball Bearing
• Speed (4.8V/6.0V): 0.17 / 0.13 sec @ 60 deg.
• Torque oz./in. (4.8V/6.0V): 42 / 49
• Torque kg./cm. (4.8V/6.0V): 3.0 / 3.5
• Size in Inches: 1.18 x 0.39 x 1.33
• Size in Millimeters: 29.97 x 9.91 x 33.78
• Weight ounces: 0.84
• Weight grams: 23.81