ABC 20PC/5Set Cheerson Upgraded 3-Leaf Propellers for CX-10 CX-10A RC Quadcopter Abc(tm) is a registered trademark and the only authorized seller of abcsell branded products. Item name: 3-leaf propellers; material: abs. Usage for cheerson cx-10 cx-10a rc quadcopter. More strength,can increase the flexibility of the quadcopter. 3-leaf propellers better noise reduction effect,can be reduced by 50%-80%.