Hattons 66's are known for there roller bearings to fall off after a bit of running
They get lost easily due to their size so these are a direct replacements for them and have been modified to reduce the wobbling of the loco when running (not guaranteed to stop it completely)
pack contains 15 roller bearings replacements,
comes unpainte
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These are absolutely brilliant they cure the Hattons class 66 axlbox problems and great value