HD-1550A analog servo with universal connector. -Operating Speed: 0.12/0.10 sec/60° -Stall Torque: 12.5oz-in. at 4.8v, 15.3oz-in. at 6.0v -Dimensions: 22.1x19.6x20.1mm -Weight: 5.5(g) -Operating Voltage: 4.8/6.0