niceeshop(TM) High Quality Carbon Fiber Magnetic Propeller Balancer Prop for Quadcopter FPV Helicopter Airplane The use of the N45 high performance magnet, fixed plate made of carbon fiber board material -Maglev-method was adopted on the center fixing axis to balance the tested products with zero resistance. -Fixed-wing propeller, helicopter rotor the maglev propeller balancer suitable for any size and weight, marine propeller, car wheels, turbine blades, flywheels, etc. Fit 0-80g Fixed wing propeller,marine propeller,Car wheel hub,Turbine blade,etc(helicopter not available) E-packet to US , need 5-15 days