World Champion ACER Racing Ceramic Ball Bearing Kit for  the Team Associated TC6.1 (all versions). Comes with the following:

4 pc 10x15mm ceramic ball bearings

8 pc 5x10mm ceramic ball bearings

2 pc 4x7mm ceramic ball bearing

2 pc 4x8mm flanged 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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