Pixnor RC Quadcopter Replacement Upgrade Parts Main CW CCW Blades with Propeller Bumper Guard Protection Cover for Cheerson CX-10 Material: durable hard ABS plastic. Including 4 sets of CWCWW propeller props and 2pcs propeller protective cover guards. Compatible with Cheerson CX-10 RC quadcopters. Ideal for replacing the old or broken propellers and propeller protective covers. Easy to install and use with the included propeller prop lash and mounting screws.