Direct extruder kit for Ender 3, Ender 3S, Ender 3 Pro. Support all 1.75mm diameter filament in the market, especially for flexible filament. The direct extrusion structure lower torque requirements on stepper motor, reducing the possibility of nozzle blockage when retracting filament. Compared with bowden extruder system, more fit for printing with PLA, TPU and other flexible filaments. This direct extruder kit is all metal structure, durable and wear resistant. Longer connecting cable, tools, accessories and diagram instruction, easy to assemble.