UBSAN Zino MINI SE User Manual page 15

Propellers
Before installing the propeller, please carefully check the letters by the aircraft motors
and the letters on the propeller. You must match those letters when installing
propellers; If the blade is damaged or needs to be replaced, unscrew the screw
counterclockwise to remove the propeller. Be sure to replace the propeller together with
the original new propeller screws to prevent accidental screw and propellers loss.
(HUBSAN Standard accessories come with original screws)
HUBSAN brand new propeller screws
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