Compatibility with-X5SA,X5SA Pro, X5SA-400 PRO, X5SA-500 PRO 3D Printer Easy to Install and Use - Switch Bowden extrusion to direct extruder at any time and easy to disassembly. It doesn't affect the inherent function of the printer because it's a complete extrusion kit. With longer Extruder motor connecting cable, tools, accessories, and wiring diagram instruction for installation, easy to assemble. Direct Extruding Smooth Feed-in - Lower torque requirements on the stepper motor, reducing the possibility of the nozzle blockage when retracting filament and malfunction when loading new filament. there is more even feed-in with direct extruding than Bowden tube extruding. Integrated All Metal Hotend - It's sturdy and wear-resistant with an all-metal shell and surface oxidation treatment; an Integrated structure is convenient for wiring and replacing. Printing at High - Temperature. Strong Compatibility: Compatible with more types of filament like PLA filament, PETG filament and TPU filemnt. When printing flexible TPU under high temperature, it can optimize TPU printing performance.