Best Filament for the Snapmaker U1
Four preheated toolheads on a 270 mm cube with up to 85 percent less purge waste, but the stock nozzle is stainless and the lid is an extra.
Specs verified 2026-11 · prices refreshed daily · page updated 6 November 2026
The Snapmaker U1 is an open-frame printer with a 270 x 270 x 270 mm build volume and a hotend reaching 300°C. It handles PLA, PETG and TPU, and it needs a hardened nozzle before running carbon- or glass-fibre filament. Recommended materials: PLA, PLA+, PETG, TPU.
The U1 is a toolchanger: four independent preheated toolheads on a CoreXY gantry, 270 x 270 x 270 mm, 300 C maximum nozzle temperature, 100 C PEI flex plate, 500 mm/s toolhead speed and 32 mm3/s maximum flow. Because each head keeps its own filament loaded, a colour change is a 5-second mechanical swap rather than a nozzle flush, and Snapmaker claims up to 85 percent less purge waste than a shared-nozzle system. Out of the box Snapmaker's own basic material compatibility list is deliberately short: PLA, PETG, TPU, PVA and PCTG. That is an open-frame machine's list, and it is accurate.
What the Snapmaker U1 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.
The $149 Top Cover is what extends that list, and Snapmaker publishes the tiers explicitly. With the Top Cover fitted, supported materials become PLA, PETG, TPU, PVA, PET, ABS, ASA, PA and PC. With the Top Cover and a hardened steel nozzle, carbon and glass-fibre-reinforced polymers join the list. The cover uses filament-adaptive thermal management, holding heat in for ABS and ASA and exhausting it for materials that want cooler air, plus three-stage filtration in internal-circulation mode. It is a controlled environment, not a heated chamber: there is no heater element, so treat PC and PA as feasible rather than easy.
Snapmaker U1 specs that affect filament
Two buying notes matter before you order filament. First, the stock nozzle is 0.4 mm stainless steel, not hardened, so no carbon or glass-filled spool should go near it: hardened steel hot ends are roughly $49 for a four-pack bundle, and on a four-toolhead machine you may want more than one. Second, four separate loaded toolheads make material pairings the real feature. A PVA or breakaway interface against PLA, two TPU hardnesses in one part, or a PETG body with a soft 95A gasket all print in one job with no cross-contamination. Snapmaker's RFID spools auto-identify, which saves slicer errors when four materials are loaded at once.
Filament notes for the Snapmaker U1
- Snapmaker's basic compatibility list without the Top Cover is PLA, PETG, TPU, PVA and PCTG only.
- Fitting the $149 Top Cover extends official support to PET, ABS, ASA, PA and PC; it retains heat but has no heater, so it is not an actively heated chamber.
- The stock nozzle is 0.4 mm stainless steel, so carbon and glass-filled filament needs the hardened steel hot end (about $49 per four-pack bundle) plus the Top Cover.
- Four preheated toolheads mean colour changes swap mechanically in about 5 seconds, cutting purge waste by up to 85 percent against a shared-nozzle changer.
- The 300 C nozzle ceiling and 100 C bed put PC and PA at the edge of the envelope; expect warping on tall parts even with the cover on.
- Pairing two TPU hardnesses or a PVA support interface against PLA is the strongest use of four heads, with no cross-contamination between materials.
- Dry PVA and TPU before loading, because a soft or wet filament in one of four loaded heads will fail a swap and abort the whole print.
The deals above are filtered to the materials the Snapmaker U1 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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