Description Using 15KG waterproof digital servo. Base thickness is about 1.5mm. The base made from Stainless steel. More easy to install & stable. About the Servo Operating Voltage: 4.8v-6.6v Stall Torque (4.8v): 12.0kg.cm Stall Torque (6.6v): 15.0kg.cm Bearing: ball bearing Operating Temperature Range: -20 ~ +60 Degree COperating Speed (4.8v): 0.07sec Operating Speed (6.0v): 0.06sec Package 1x 6DOF Robot Arm