8Pairs 3-Leaf Propeller 7X3.7X3 7037/ 7X5X3 7050 / 7X4X3 7043 / 7.5X3.7X3 7537 Plastic CW CCW Prop for 7inch RC FPV Drone Paddle Color:8Pairs 4.9x4 ES900RX：

ES900RX：

The load speed is 41500 ¡Â 6% RPM

Thrust (kg): 5

then switch on the unit and wait for the data to change to single digits before taking another speed test

5mm shaft design instead of thread shaft for saving weight

8Pairs 3-Leaf Propeller 7X3.7X3 7037/ 7X5X3 7050 / 7X4X3 7043 / 7.5X3.7X3 7537 Plastic CW CCW Prop for 7inch RC FPV Drone Paddle Color:8Pairs 4.9x4 ES900RX：Detail: Model: 7. 5X3. 7 7X5. 5 7X4 7X3. 7 7X3. 5( optional) Propeller Diameter: 7. 5inch(7. 5X3. 7X3), 7inch Pitch : 3. 7,5. 5(7X5. 5),3. 5(7X3. 5) Material : Plastic Weight : 10g(7X5. 5) ,9. 7g(7X4),9. 4g(7. 5X3. 7),8. 8g(7X3. 5) ,8. 2g(7X3. 7) Hub Diameter : 15mm(7. 5X3. 7),13. 8mm(7X3. 7),13. 5mm(7X3. 5)(7X4),13(7X5. 5) Hub Thickness: 6. 8mm ,7mm(7X3. 5) Shaft : 5mm Adaptor Rings : NO Package Content: 8pairs * propellers ( 4 x CW + 4 x CCW )