ITEM NAME:Black for DJI RoboMaster S1 Front Axle X Arm Educational Robot Aluminium Al E4C2 Black for DJI RoboMaster S1 Front Axle X Arm Educational Robot Aluminium Al E4C2 1. Made of aluminum alloy, anodized, CNC fine machining. 2. Accurate size, suit for DJI RoboMaster S1. 3. Reliable quality, stable load capacity. 4. Anti-collision performance and lightness. size:5*5*1.5cm colour:black Material:Aluminum alloy Package Contents: 1 * Front axle X arm.Accurate size, suit for DJI RoboMaster S1. 1 Front axle X arm. Made of aluminum alloy, anodized, CNC fine machining. Material:Aluminum alloy.