YKS ATG A-1 Magnetic Levitation Propeller Balancer For Quadcopter FPV Propeller Material: Nylon and Aluminum Alloy, made from high-strength materials. 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. Unique Design: Designed with a small plate at the bottom of the balancer, saving space and ensuring better stability. Compact and easy to use.