6 millimetri albero motore.
8 millimetri Albero di trasmissione.
adattatore lega con vite senza testa e dado di metallo.1pc soltanto.
The prop adapter I wanted, (collet type) was not available so I was forced to use this one with the grub screws, when attempting to tighten the grub screws I discovered they were so poorly made neither a metric or an imperial allen key would fit them, I replaced them with hex head screws, what little imbalance they cause is negligible to a 900kv motor running on 3s, would I recommend it...No not unless you have the steel hex head screws to replace the grub screws, so 4 stars for the dodgy grub screws the rest of the adapter is well made, I prefer the collet type and wont buy this again unless I was forced to
exelente item recomendo38,5mm long, outside diameter 22mm, weight 17 g
Two M3 grub screws in 90 angle (not face to face)