https://dronestuffpro.com/product/cinhent-drone-accessories-kit-4-pcs-quick-release-lock-propellers-ccw-cw-props-blades-for-dji-tello-mini-racing-drone-quadcopter-spare-part-low-noise-and-quick-release/
Cinhent Drone Accessories Kit, 4 PCS Quick Release/Lock Propellers CCW CW Props Blades For DJI Tello Mini Racing Drone, Quadcopter Spare Part, Low-Noise and Quick-Release