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LONG version of the Skytec adjustable upper bearing housing (h=28mm), which comes with a pre-installed industrial grade high quality bearing made by SBN Japan.
The bearing is considerably larger than stock, for smoother operation and better centering of the upper rotor head.
The bearing housing can be adjusted in heigth by about 10mm thanks to being mounted with 2 M3 grub screws instead of being press-fitted.