World Champion ACER Racing Ceramic Ball Bearing Kit for the Creation Model Ltd Infinity IFI4 1/10 EP remote controlled model. Complete 22 piece bearing kit replaces all 22 bearings in the I4 with our Ceramic Nitride Pro Series legendary ceramic 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.