2 PACK HS-55 Feather Servo High quality and high performance at a great price Speed: 0.18sec/60 at 4.8 Volt 0.14Sec/60 at 6.0 Volt Torque: 1.2kg (16.66oz-in) at 4.8Volt 1.5kg-cm(20.83oz-in) at 6.0Volt Weight: 8.0g(0.28oz) Size 22.8 X 11.6 X 24mm(0.89 X 0.45 X 0.94in)