i was lucky that it broke off completely so that my hexacopter with Dji Mv2 controller could make a "controlled" crash landing so minimal damage but I would not trust these I run 700KV motors on four cell lipo maybe it was too much did not see any max rpm otherwise, pretty quiet and well balanced propeller think I'll run some more bench testing to see if I was unlucky or if they actually have weak hubs ..
Banggood Dear customer,we apologize for any inconvenience to you,about your product problem, our customer service have contacted you, we would give you a solution in time.
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