Compatibility Direct replacement hot end for Elegoo Neptune 4 Max and Elegoo Neptune 4 Plus 3D printers. What's included Fully assembled hot end kit: precision brass nozzle, connector, throat, heater block, and thermistor. Ready to install out of the box. Key benefits — why you need this Restores and improves print quality: precise brass nozzle and wellmachined heater block deliver consistent filament flow and better surface finish. Reduces common failures: heated assembly and tight fittings help prevent filament leakage and lower the chance of clogs. Longerlasting performance: metal construction and precision processing reduce wear on mating parts for more reliable operation over time. Saves setup time: delivered as an assembled kit so you can swap the old hot end quickly and get back to printing. Performance and materials Nozzle: precision brass for consistent extrusion and good thermal transfer. Construction: metal removable hotend design for durability and stable filament path. Sensor: included thermistor for accurate temperature monitoring and stable heating. Result: smoother, more accurate prints with minimized leakage and reduced maintenance. Installation and use Designed for straightforward installation on the specified Elegoo models. Precision machining ensures smooth filament output and easier alignment during replacement. Assembled components reduce the chance of installation errors and calibration time. Practical applications Rapid prototyping: a worn hot end to regain dimensional accuracy and speed up iteration cycles. Detailed models and miniatures: improved nozzle precision and stable heating help reproduce fine details and clean layers. Functional parts and smallbatch production: reliable filament flow and reduced leakage produce stronger, more consistent prints for enduse components. What it solves Replaces worn or damaged hot ends to eliminate inconsistent extrusion and leakage. Reduces downtime and maintenance with a durable metal design and preassembled parts. Improves print accuracy and surface quality through precise nozzle geometry and stable temperature control. Compatibility reminder Specifically compatible with Elegoo Neptune 4 Max and Elegoo Neptune 4 Plus. Use the included thermistor and heater block as replacements for the original components to maintain proper temperature control and performance.