RaceKraft props are a PC blend making them nearly unbreakable for drone hobbyists. Diameter 3 Inches, Pitch 3 Inches, Hub hole 5mm (M5). Each Pack: 8 clockwise rotation, 8 counter-clockwise rotation. With this lower pitch prop, most freestyle fliers feel more "resolution" throughout the throttle range. And because they are not bullnose, they're easier on your batteries. Excellent balance out of the package.