Features: Racing flight: Propeller designed for FPV racing drones, with excellent flight performances and response speed, suitable for racing flight enthusiasts. High strength material: Made from quality material, it has excellent strength and durability, and can withstand high-speed and high load flights. Multiple specifications: Multiple propeller sizes (7037/8040/8060/9045/1050) are available to meet the needs of different drones. Lightweight design: The propeller adopts a lightweight design to reduce the overall weight of the drones, improve flight efficiency and control performances. Quick installation: Convenient for users to quickly install or replace propellers, saving time and providing flexibility. Specifications: Material: Carbon Nylon/PC Set Type: A,B, C, D, E(optional) Type: 7037 Pitch: 3.7in Props Disk Diameter: 178.7mm Center Thickness: 7mm Center Hole Inner diameter: 5mm Props Width: up to 18.5mm Recommended Motor: 2808 and up Type: 8040 Pitch: 4in Props Disk Diameter: 204mm Center Thickness: 7.5mm Props Width: up to 20mm Recommended Motor: 2812 and up Type: 8046 Inch: 8in Pitch: 4.6in Recommended Motor: 2812 Type: 9045 Pitch: 4.5in Props Disk Diameter: 229.5mm Center Thickness: 9mm Center Hole Inner diameter: 5mm Props Width: up to 20mm Recommended Motor: 3212 and up Type: 1050 Pitch: 5in Props Disk Diameter: 254.6mm Center Thickness: 9mm Center Hole Inner diameter: 5mm Props Width: up to 22mm Recommended Motor: 3214 and up Package Includes: 1 Set Propellers note: A type set is: 1 pair of 1050 models B type set is: 2 pair of 7037 models C type set is: 2 pair of 8040 models D type set is: 1 pair of 8060 models E type set is: 1 pair of 9045 models