Compatible for DJI Phantom Version 1 and Version 2
Silver is clockwise and black is counter clockwise
Higher tension and very easy to install
2pairs including 2 CW propellers and 2 CCW propellers

Compare with 9430:
Power has noticeable improve，more flexible control
Variable propeller pitch will provide different feeling
9.4 x 5.0 inch diameter with a maximum thrust of 660g with 2212 motor KV920 12V