TowerPro SG90 9g Micro Servo Mini Gear Motor RC

Features:

It is tiny and lightweight with high output power. This servo can rotate approximately 180 degrees (90 in each direction), and works just like the standard kinds but smaller. You can use any servo code, hardware or library to control these servos.It comes with a 3 horns (arms) and hardware.This is the most popular mini servo motor. Only weights 9 gram and gives you a 1.5kg.cm torque. Pretty strong regarding its size. Suitable for Beam type robot.