Optimized Performance: Designed specifically for high-performance X-class multirotor aircraft, the 13x9x3 propellers ensure optimal thrust and efficiency 3-Blades: Its unique 3-blade configuration provides a perfect balance between power and control, making it ideal for competitive FPV racing and agile flight maneuvers Durable Material: These propellers are made of black carbon fiber reinforced nylon for excellent durability and break resistance. This material choice not only prolongs the life of the propellers, but also provides stable performance in a variety of flight conditions Compatibility: The propellers are compatible with both clockwise (CW) and counterclockwise (CCW) motor rotation, allowing for easy installation and versatility across different drone models. Suitable for 13-inch class drones Propeller Diameter: 13 inch Pitch: 9 Blades: 3 Hub Diameter: 21.5mm Hub Thickness:12mm Shaft: 5mm Adaptor Rings: 6MM/5MM/4MM/3MM Colour:Black Material:Carbon fiber reinforced nylon Package Contents: 2 Pairs * Propellers (2CW + 2CCW) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.