Model: 51433 5-inch tri-propellers designed Compatible with superior maneuverability in racing. Compatibility: Suitable Compatible with various brushless motors, enhancing your drone's performance and efficiency. Design: Tri-structure offers improved stability and control during -speed flights. Durability: Crafted from resilient materials to withstand the rigors of racing and outdoor activities. Versatility: Ideal Compatible with racing drones, ensuring a competitive in both racing and freestyle flying. Performance: Engineered to deliver thrust and responsiveness Compatible with agile flight controls. Package: Comes in a set of 8 pieces (4 pairs) Compatible with easy replacement and continuous flying action.