Description
High Flow Hotend Kit for Elegoo Neptune 4 / 4 Pro
This complete high flow hotend kit is a direct upgrade for the Elegoo Neptune 4 and Neptune 4 Pro, bundling a high flow nozzle, matching heating block, and a protective silicone sock in one plug-and-play package. The increased melt throughput lets you push print speed and layer width further before hitting under-extrusion, while the all-metal construction improves reliability at sustained high temperatures.
Why Upgrade to High Flow?
The Neptune 4 and 4 Pro’s stock hotend is capable, but its melt rate limits how far you can push print speed before extrusion falls behind and quality suffers. A high flow hotend increases the nozzle’s internal melting capacity, letting the printer’s motion system actually be the limiting factor rather than the hotend — particularly valuable for large functional prints, batch production, and anyone chasing shorter print times without sacrificing wall quality.
Complete Kit — Not Just a Nozzle
Rather than sourcing a nozzle, heat block, and sock separately and hoping they match, this kit includes all three as a matched set engineered to work together — high flow nozzle, compatible heating block, and a silicone sock sized for a correct fit. Everything you need for a full hotend refresh in one purchase.
Silicone Sock Included
The included silicone sock fits over the heater block, protecting it from filament buildup and helping maintain stable nozzle temperature by reducing heat loss to ambient airflow — particularly useful on printers with strong part cooling fans that can otherwise pull heat away from the heat block during printing.
All-Metal Construction
The hotend uses an all-metal design with no PTFE in the melt zone, improving reliability at higher sustained temperatures and avoiding the gradual degradation that PTFE-lined melt zones can experience from repeated heat cycling over time.
Compatibility
Elegoo Neptune 4
Elegoo Neptune 4 Pro
Not compatible with the Neptune 4 Plus, Neptune 4 Max, or other Elegoo printer models — those use different hotend interfaces.
Installation
Power off the printer and allow the hotend to cool completely before installation. Remove the existing hotend assembly, install the new nozzle and heating block as a matched set, fit the silicone sock over the heat block, and reconnect wiring. After installation, verify nozzle settings match in your slicer before starting a print.
What’s Included
High flow hotend nozzle × 1
Heating block × 1
Silicone sock × 1
Specifications
Construction: All-metal, no PTFE in melt zone
Filament diameter: 1.75mm
Compatibility: Elegoo Neptune 4, Neptune 4 Pro








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