Diameter for mounting propeller

Dear Sir or Madam
Can you tell me how big is the diameter of the propeller mounting. I want to mount the propeller GWS 8040 he has an diameter of 7mm. I hope the diameter of the engines
HD3011-1900KV, HD2910-1700KV, HD3010-2100KV, HD3011-1900KV ist he same also 7mm?
Thanks for your answer
Urs Sigel