Team Associated RC10 Classic Shielded Bearing Set (9) 3/16x5/16x1/ 8 Flanged (5) 1/4x3/8x1/ 8 Flanged (2) 3/16x5/16x1/ 8 You are purchasing the bearing noted above. Oftentimes the bearing sizes may alter depending upon your specific model and the date that it was produced along with various hop ups you may have installed. PLEASE DOUBLE CHECK you R/C prior to buying to make sure you get all the proper bearings. We try to keep the packages upgraded as best as we can. If you discover a variation or error in our packages, please contact us so we can check out it.