Best Filament for the Elegoo Neptune 4 Pro
The Neptune 4 with upgraded cooling and dual-port part fans: same open frame, brass nozzle, and 300°C ceiling.
Last updated: June 2026
The Neptune 4 Pro shares the base Neptune 4's 225 × 225 × 265 mm build volume, Klipper firmware, dual-gear direct-drive extruder and 300°C hotend, but adds better part cooling (dual-port cooling with an improved duct) and a tidier wiring/cooling setup for the electronics. It runs the same 121-point auto bed leveling and the same 500 mm/s top speed. The cooling upgrade mainly helps overhangs and PLA detail at speed.
What the Elegoo Neptune 4 Pro prints well
Recommended materials for this printer:
No enclosure, so ABS, ASA, PC and nylon will warp and crack. Stick to PLA, PLA+, PETG and TPU for reliable prints. Carbon- and glass-fibre composites also need a hardened nozzle first.
For filament purposes it behaves like the base model: brass nozzle out of the box, so swap to a hardened steel kit before any carbon-fiber or glass-fiber filament. It's still an open frame with no chamber heat, so ABS and ASA are warp-prone without an enclosure. Where the Pro shines is fast PLA and PETG with crisp overhangs thanks to the stronger part cooling, plus TPU, which the short direct-drive path handles cleanly.
Elegoo Neptune 4 Pro specs that affect filament
Pick the Pro over the base Neptune 4 if you print a lot of PLA detail or overhangs and want the better cooling. For abrasives or engineering plastics, the enclosed hardened-nozzle Centauri Carbon remains the better-suited choice.
Filament notes for the Elegoo Neptune 4 Pro
- Brass nozzle ships standard. Upgrade to hardened steel (~$12) before carbon-fiber or glass-fiber filaments.
- Improved dual-port part cooling makes PLA overhangs and fine detail noticeably cleaner at high speed.
- 300°C hotend covers PLA, PETG, ABS, ASA and TPU. Not intended for high-temp engineering plastics.
- Open frame, no chamber heat. ABS and ASA need a DIY enclosure to print without warping.
- Direct-drive extruder runs TPU and flexibles well, including softer grades at moderate speed.
- Dry PETG, TPU and nylon before printing. The open frame offers no humidity buffer.
- PLA and PETG at high speed are the strongest use case thanks to the upgraded cooling.
The deals above are filtered to the materials the Elegoo Neptune 4 Pro handles, aggregated from multiple retailers daily and normalised to cost per kg, so the cheapest in-stock option is always on top. Prices refresh every 24 hours and are region-aware, so switch your region in the nav. Click through to the retailer to confirm the live checkout price.
Frequently Asked Questions
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