4 x Main Blades Replacement/Spare Part for Haktoys&reg; HAK907 17" Diagonal 2.4GHz 4CH RC Quadcopter Package contents: 1 x Orange A-Blade, 1 x Orange B-Blade, 1 x Black A-Blade, 1 x Black B-Blade Compatible with Haktoys HAK907 NOTE: blades are not interchangeable. Make sure to install the correct blade.