Super high performance thrust bearing assembly. They make for a silky smooth diff without the expense of ceramics. They also have a cage so they are easy to assemble.

These thrust bearings are some of the longest lasting parts I've ever seen. Mine are going on 2 seasons now and I just remove re-grease and they are as good as new!!

These particular McMaster thrust bearings will fit into a Losi Type, JRX-S, Xray T2 series or any other car that has thrust bearings with these dimensions: For Shaft Diameter 3 mm
Outside Diameter 8 mm
Thickness 3.5 mm