K-Power MM0300 Premium Standard Analog Servo, Dual Bearing, Metal Gear, .12Sec/4.5kg 3kg-cm torque Metal Gear Standard Analog Servo Torque: 3.8kg-cm/4.8V; 4.5kg-cm/6.0V (52oz-in/4.8V; 62oz-in/6.0V) Speed: 0.13sec/60*/4.8V; 0.12sec/60*/6.0V Weight: 58g / 2.0oz; Dimension: 40*20*39mm / 1.6*0.8*1.5in(L x W x H) Gear material: Metal, Bearing Type: 2 BB; Splining: 25T