Mounted hotend kit for Neptune 4 Plus and Neptune 4 Max Not for Neptune 4 and Neptune 4 Premium , please if you have any questions 【Adaptation】- Assembled all-metal hotend kit for Neptune 4 Plus and Neptune 4 Max ONLY.Not for Neptune 4 and Neptune 4 . 【Easy to operate】- Simply Replace Your Old Extruder With A New Hot End To Started. We Recommend Checking The Sealing Of Each Part Before Use. After Installing This Hot End Print Head Kit, We Recommend That You Readjust The Hot Bed For Optimum Performance. 【Upgraded Material】- The extended hotend nozzle can withstand temperatures up to 300°, making it capable of printing PLA, PETG, ABS, TPU, and high-temp filament nylon. 【Sales 】- 100% with Elegoo Neptune 4 Plus/Neptune 4 Max 3D FDM printer .Please via “ask a question”directly to the professional assistance.