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Great replacement. This 3D printer upgrade kit includes the main necessary 3d printer upgrade parts needed to replace the extruder and hot bed leveling. The Leveling springs, hand twist nuts and extruder are combined to greatly improve the printing quality of your 3D printer. They are great original upgraded replacement for Ender 3/3 Pro/3 V2/3 Max/Ender 5/5 Plus/ 5 Pro/CR-10/CR-10 V2/CR-10 V3.

MK8 all-metal extruder. High quality aluminum alloy material and sandblast to surface oxidization, ensuring this extruder is last for long term use, greatly making the extruder retain power in filament feed-in.

Yellow compression springs. More stiff and and accurate bed leveling, makes leveling the bed is easier and stronger than before, so you don't have to worry about leveling the bed over and over after printing.

Red hand twist level nuts. The metal nuts are stronger than the original plastic nuts and twisted more tightly. The high torque on these nuts makes it easier to fine-tune the hotbed, keeping your printer level without the need for constant leveling.

Easy to Install. DIY kit and you need to assemble by yourself. The full necessary screws & parts kit is included.