This is the DJI genuine propellers. 

Designed to use with DJI original full-enclosed propeller protection net.

DJI 7728 Fast-remove Propeller Set for DJI Mavic (CW/ CCW) Part 27

Prop size: 7.7 x 2.8 inch
Weight: 6.5g

Includes:
1 x CW (clockwise) prop
1 x CCW (counter clockwise) prop

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