2 PACK Mighty Mini HS-225BB Servo High quality and high performance at a great price Speed: 0.14sec/60 at 4.8Volt Torque: 3.9kg.cm(54oz.in) at 4.8Volt Weight: 27g(0.95oz) Size: 32 X 17 X 31mm (1.27 X 0.66 X 1.22)"