Savox SC-1201MG Tall Digital Steel Gear Servo. 

Features:

• Metal gear train ensures durability and longevity.
• Great replacement for RTR servos and other 1/10 off road vehicles.
• Great Performance which is budget friendly.
  

Specifications:

• Torque @ 4.8v: 20.0kg/278.0oz-in
• Torque @ 6v: 25.0kg/347.0oz-in
• Speed @ 4.8v: 0.15 sec/60 deg
• Speed @ 6v: 0.12 sec/60 deg
• Dimensions L x W x H (mm): 40.7 x 20.0 x 42.4
• Weight: 69.0g