Editorial Review TRB RC Precision High Speed Ball Bearing Kit, Chrome Steel with Rubber Seals.Fits: Team Associated RC10B4, T4Note: Due to Manufacture model updates always verify your model sizes for proper application.Features:*Chrome Steel Precision Races*Chromium Steel Balls*Rubber Seals to Help Fight Dirt *Great Quality & Value For Applications Includes:Dimensions and Quantity as follows: ID, OD, Width:3/16x3/8x1/8" Qty. 12 R166-2RS3/8x5/8x5/32" Qty. 2 R1038-2RS1/8x1/4x7/64" Qty. 4 R144-2RS18 Total Ball Bearings*Part # TRB-500041*Part SKU# AEB4T4-TRB-500041