3D Printer Filament Guide: PLA, PETG, TPU & More

The filament you load matters as much as the printer. Here’s how to pick the right material for the job — and the rolls actually worth buying.

PLA: the everyday default

PLA is the filament most people should start with — and honestly, most people should stay with. It prints easily at low temperatures (190–220°C), needs no enclosure, and comes in every color you can think of. It’s ideal for models, prototypes, and decorative parts.

The tradeoff: PLA is brittle and softens in heat, so skip it for anything load-bearing or left in a hot car.

PETG: strong & functional

PETG is the step up for functional parts — stronger and more heat-resistant than PLA, prints at 230–250°C, and handles outdoor use better. It’s a bit stringier to dial in, but for brackets, mounts, and household fixes it’s the right material.

TPU: flexible parts

TPU is flexible filament — phone cases, gaskets, drone parts, and anything that needs to bend. It’s slower to print and trickier to feed through some setups, but a tool changer like the H3C handles it easily, and modern direct-drive printers manage fine.

ABS / ASA: heat & weather

ABS and ASA are the tough, heat-resistant materials for automotive and outdoor parts. They print hot (240–260°C), warp without an enclosure, and off-gas during printing — so use ventilation. ASA is the UV-stable version for things that live outside.

Specialty: carbon fiber, silk, wood

Carbon-fiber-filled filaments (like PETG-CF or PA-CF) are stiffer and lighter for functional parts — but they wear out brass nozzles, so use a hardened steel one. Silk and wood-fill filaments are cosmetic: gorgeous finishes, weaker parts. Use them for display pieces.