Do you want the best linear bearings for your Prusa Mini(+), if so, you should get this kit and replace the current ones! While Prusa ships the MK3S+ with MISUMI bearings, the Mini still has cheap generic bearings. These original LMU8 bearings from MISUMI roll way smoother and aren't as loud as the generic ones.
In this kit you'll find all linear bearings you'll need to perform the upgrade on the X and Y axis, including great PTFE Lubricant for the bearings from SuperLube.
5x Original MISUMI LMU8 Linear Bearings
1x SuperLube PTFE Grease 1/2 oz. (optional)
You can find great installation guides from Prusa here: