I use these on my 450 frames and 500 Alien frames - they fly well - quieter than most and these I just recieved did not even need and balancing.

I use these on my 450 frames and 500 Alien frames - they fly well - quieter than most and these I just recieved did not even need and balancing.

I use these on my 450 frames and 500 Alien frames - they fly well - quieter than most and these I just recieved did not even need and balancing.

Great buy, thank you Banggood!

Great buy, thank you Banggood!

Great buy, thank you Banggood!