Lead screw nut with anti-backlash T8X2. Special anti-backlash, bronze nut, compatible with the high-precision T8X2 lead screws. Using that kind of nut you are able to get rid of the inaccuracies during printing called Z wobble effect.
GT2 10x2mm timing belt with steel cord. High quality polyurethane timing belt with steel reinforcement for linear motion. As it is reinforced with steel you are ensured a low-maintenance high-quality product. You can use it for long XY axes; it is very resistant for high temperatures.
Linear rail MGN12H 400mm Linear rail (guide) allows heavy loads to be moved while maintaining stable linear motion. This type of bearing can carry load both horizontally and vertically, ensures low drag and smooth movement while maintaining high reliability and longevity.
Linear bearing LMU8 MISUMI An equivalent to the standard LM8UU linear bearings manufactured by the Japanese company MISUMI. It is known from its extremely high quality and is officially recommended as a replacement for bearings for Prusa MK2, MK2A, MK3 printers.
Other mechanical parts
Ender 3 Dual Z upgrade kit It allows you to increase the precision and speed of printing especially with heavy direct extruders that can bend the axis. The modification uses a single motor just like the original printer and does not require any additional parts.