About Winter Evening Bearing KitsThe Winter Storm Series Bearings are all-new and durably designed. Built using the latest technologies and innovation such as HybridBlue rubber seals, 20% stronger chrome steel refined to P6 precision, and lubricated with industrial grade grease. In other words, we designed this kit to be long lasting, fast, and ultimately fun.This bearing kit is compatible with kits/part # as shown below:Axial: AXA1243Arrma: AR610018Losi: LOSA6944Mugen: E0601Team Associated: 89162This kit includes the following premium bearings: 15x21x4mm (10 Pieces)Featuring: Premium P6 Precision HybridBlue Rubber SealsChromium Steel Structure Pre-greased with synthetic micro bearing grease.Note: Please double check the bearings needed especially if you have upgraded to aftermarket parts. Thank you!