Editorial Review TRB RC Precision High Speed Ball Bearing Kit, Chrome Steel 52100 (GCr15) ABEC 3 with Metal Shields.Fits: Team Associated RC10 ClassicNote: Due to Manufacture model updates always verify your model sizes for proper application.Features:*Chromium Steel 52100 (GCr15) ABEC 3 Races*Great Quality & Value For Applications Includes:Dimensions and Quantity as follows: ID, OD, Width:3/16x5/16x1/8" Qty. 9pcs # FR156-ZZ Flanged1/4x3/8x1/8" Qty. 5pcs # FR68-ZZ Flanged3/16x5/16x1/8" Qty. 2pcs # R156-ZZ16 Total Ball Bearings