DJI E300 Carbon Reinforced 9443 Self Tightening Propellers DJI E300 Propeller Pair Black Carbon Fibre Reinforced 9443 Self Tightening 1 x CW and 1 x CCW These propellers are the ideal upgrade as they use a carbon fibre mix instead of the traditional glass fibre so offer a much stiffer prop and offer better lift and thrust. PHANTOM 2, PHANTOM 2 VISION, PHANTOM 2 VISION PLUS 9" PROPS Upgrade propeller pair for the E300 and E310 propulsion system and ideally suited to the DJI F450 and DJI F550 kits