XCSOURCE DIY 4-Axis 250 3K Carbon Fiber FPV Quadcopter Kit Combo CC3D Motor12A ESC Propeller RC005 Main material: 3K Carbon Fiber (carbon/glass fiber mixture ) Wheelbase: 250mm With rubber damper to decrease vibration during flight Aluminum alloy spacer, light weight, reliable Note: All the rubber damper and screws, spacer are in random color.