Do you want the absolute best bearings for the price? Then this MYT bearing kit is perfect for you. While being of similar quality as the MISUMI bearings, these bearings cost significantly less. These high-quality bearings are the perfect upgrade/replacement for your Prusa MK4. This kit is available for the X- and Y-axis only, and for the X-, Y- and Z-axis. The Z-axis bearings don't wear nearly as much as the X- and Y-axis bearings, so they don't need to be replaced as often.
6x MYT LM8UU Linear Bearings
2x MYT LM10LUU Linear Bearings (only with XYZ-Axis version)
1x Super Lube PTFE Grease 12 g (optional)