YKS Carbon Fiber Magnetic Multi-axis Rack Propeller Balancer for Quadcopter FPV Material: High quality carbon fiber and high-performance N45 magnet. Magnetic Levitation: The center axis has used magnetic levitation method to be hung on the center of the balancer, which ensured zero-drag of the testing propeller in balance. Broad Compatibility: Applicable to any size and 80 grams or less fixed-wing propeller, marine propeller, car wheels, turbine blades, flywheel, etc. Better Stability: Use 3 support bar construction, which ensures better stability and higher sensitivity. Compact and easy to use.