This is upgrading part for 450 size electric helicopters like T-Rex 450 Series and GL 450 Series etc.
The central base is removable from the main gear, it makes replacing main gear much easier, and only need to remove the 4 screws.
This is a upgrading parts from vice factory.
1 x main gear
1 x central base
1 x one-way bearing
4 x fixing screws
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