What prop?

[ultracruiser41]

Anyone out there using an AutoFlight gearbox??...if so...what prop hub dimensions should I order? It is not a standard rotax size hub and it doesn't look like it matches the 912 hub.

Thanks,

Barry

[WHY]

Barry , am not sure but that may be a standard SAE-1 regular aircraft size (ie c-65 c-85 O-200 ect)