World Champion ACER Racing Ceramic Ball Bearing Kit for the Kyosho Mini Inferno. Comes with the following ball bearings:

8 pc 4x8mm ceramic ball bearings

3 pc 4x7mm ceramic ball bearings

1 pc 3x6mm ceramic ball bearings

2 pc 6x12x4mm ceramic ball bearings

8 pc 6x10mm ceramic ball bearings

Oiled, not greased, with 100% synthetic SIN oil for super smooth and fast action. Uses lightweight diamond polished silicon nitride ceramic balls. Feel the difference and race faster, longer with these lightweight, fast and extremely durable ceramic bearings.

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