Specifications: Durable and easy install Suitable For Syma X5 X5C X5SC RC Quadcopter Material: Plastic and Copper Type: Gearsets, Motor Gear Package Included: 4X Gearsets 4X Motor Gear Note: Due to the Crafts problem, the copper gear may be a little loose the motor rod, and need a little glue to connect the brass gear and motor rod.