Specifications: D9257MG Operating temperature: -20?~+60? Operating voltage: 4.8V ~ 6VDC; Working frequency: 1520 s / 333hz; Torque: 5.0kg.cm at 4.8V; 6.0kg.cm at 6V; No load speed: 0.07s/60 at 4.8V; 0.06s/60 at 6V; Corner angle: 180 Product weight: 29g ; Boundary dimension: 35.9*15.2*28.6mm; Motor type: Coreless motor; Gear type: Metal gear. Package included: 2 * 25G Full Metal Gear Digital Servo 2 * Servo Accessories 2 * 25T Metal Servo Arm