Rage RC S142-16-6VM Standard Size Metal Gear Analog Servo, Torque/Speed@6V 142/.16 Dimensions: 40.8  20.1  38 mm, Weight: 56 g Operating Speed: 0.18sec/60degree (4.8V), 0.16sec/60degree (6V) Stall Torque: 9kg.cm/125.2oz.in(4.8V), 10.2kg.cm/141.9oz.in(6V) Bearing Type: 2BB, Gear Type: Metal