Features:Full use of carbon fiber and aluminum CNC machining, applies to all the main rotor mounting holes for the 2-5MM diameter All of the main rotor, the overall 2MM Carbon metal frame structure, anchor using franc bearing design, standard. Level viewer, easy to adjust the main rotor balance. While additionally equipped with a magnetic balancer, can be more accurate detection of the main rotor static and dynamic balance.Suit for 250-700 airplane propeller and quadcopter FPVMaglev-method was adopted on the center fixing axis to balance the tested products with zero resistanceSuit for different weight and size propellers, blades, boat propellers, etc.Specifications:Size: 100*71*55mmMain Color: Orange + BlackNet Weight: 97gPackage includes:1 x Propeller Balancer (Unassembled)1 x Screw set