SUNLU 3KG Large Spool TPU Filament 1.75mm - Fast Flexible Prints

Our review of the SUNLU 3KG TPU filament finds it best suited to makers who need long, flexible prints without frequent spool changes; the single biggest reason to buy is the large 3kg capacity combined with a high-speed TPU formulation that promises faster print times while retaining useful elasticity. The spool is vacuum sealed for moisture protection out of the box and the filament's claimed dimensional accuracy and Shore 95A balance make it a practical choice for wearable parts, gaskets, and functional prototypes where resilience and abrasion resistance matter.

Key Features

• High speed TPU: Prints up to three times faster than ordinary TPU, which reduces job time for larger flexible pieces.
• 3kg spool capacity: A big roll decreases spool swaps and is convenient for extended projects and small-batch production.
• Shore 95A hardness: Provides a balance of softness and resilience so printed parts withstand collisions, impacts, and wear.
• Excellent layer adhesion: Strong interlayer bonding produces smooth surfaces and reliable mechanical performance in flexible prints.
• Dimensional accuracy: 1.75mm diameter with +/-0.03mm tolerance improves feed consistency and compatibility with most FDM printers.
• Vacuum packaging: Airtight sealed packaging helps keep the filament dry and ready to print without additional drying for short-term storage.

Who It's For

This filament is ideal for hobbyists and small-scale makers who print flexible components like watch bands, phone cases, drone bumpers, and bike parts, and for those using direct-drive setups that benefit from TPU elasticity. It also fits workshops that prefer fewer spool changes during long runs.

Those who should look elsewhere include users needing extremely soft elastomers below 95A or filaments tuned for specialty chemical resistance; also consider smaller spools if space or weight is a concern, and users who require water-dry storage for long-term filament archiving should pair this with a filament dryer.

Pros & Cons

Pros

• Large 3kg spool offers long print times and better value for repeated flexible prints.
• Good printability and strong layer adhesion yield clean surfaces and dependable mechanical parts.
• High speed capability shortens print time for TPU projects without sacrificing resilience.
• Vacuum packaging and tight diameter tolerance improve out-of-box reliability.

Cons

• Shore 95A may be too firm for projects that require very soft elastomeric feel.
• Some users report mixed results with adhesion on certain machines, so tuning may be required for best results.

Specifications

Material	Thermoplastic polyurethane (TPU)
Diameter	1.75mm
Spool weight	3KG (6.6lbs)
Shore hardness	95A
Recommended nozzle temp	210-230C
Recommended bed temp	50-60C
Printing speed	80-120mm/s (faster printing supported)

Our Verdict

The SUNLU 3KG TPU filament is a solid value for makers who need a durable, fast-printing flexible filament with minimal spool changes; its combination of large capacity, vacuum packaging, and tight diameter tolerance makes it a practical choice for wearable and functional parts. It is particularly good for users with direct-drive or well-tuned extruders, while those needing softer elastomers or long-term moisture control should plan additional testing or drying.

Frequently Asked Questions

Is this filament compatible with most FDM printers?
Yes, the 1.75mm diameter and +/-0.03mm tolerance make it compatible with the majority of 1.75mm FDM printers.

Do I need to dry the filament before printing?
It arrives vacuum sealed to stay moisture-free, but if it has been stored long-term outside the packaging use a filament dryer for best results.

What print settings work best?
Start with 210-230C nozzle, 50-60C bed, and 80-120mm/s print speed and adjust retraction and flow for your specific extruder.