Filament of the Gods — 1kg Premium Flexible Filament, ±0.03mm Tolerance

Ambrosia's TPU 95 isn't just flexible filament — it's a premium formulation built to a tighter tolerance than the industry standard, additive-free, and wound on an eco-friendly cardboard spool that ships vacuum-sealed with desiccant. If you've had inconsistent results with generic TPU, the difference starts with the tolerance: ±0.03mm vs the ±0.05mm standard that most brands ship.

Consistent diameter means consistent extrusion pressure. Consistent extrusion pressure means no unexpected under-extrusion mid-print. That's why Ambrosia calls it the Filament of the Gods — and why the community keeps coming back to it.

⚠️ Before You Print — Critical Setup Notes

TPU 95A requires a direct drive extruder for reliable results at any meaningful speed. On a Bowden setup (stock Ender 3, CR-10, standard Anycubic), TPU is printable but slow — 15–25mm/s maximum. On a direct drive machine, this filament performs as designed.

⚠️ Bambu Lab users: TPU 95A is NOT compatible with the standard AMS or AMS Lite. It must be fed via the external spool holder directly into the extruder. Bambu's direct drive toolhead handles TPU 95A excellently — the AMS hub is the limitation, not the printer. Use the external spool mount and bypass the AMS entirely.

⚠️ Cardboard spool dryer limit: The adhesive holding this cardboard spool together is rated to 70°C (158°F). If you use a filament dryer that exceeds this temperature, print a spool clip before drying to keep the spool from delaminating. Free spool clip files on Printables.

What Makes TPU 95A the Right Hardness

TPU hardness is measured on the Shore A scale. Think of a shopping cart wheel — firm enough to support load and roll smoothly, but it gives slightly when you compress it and springs back immediately. That's 95A. It's the most printable and most versatile TPU hardness: stiff enough to feed through most extruders without buckling, yet flexible enough for everything from phone cases to gaskets to vibration dampeners.

Shore Hardness	Feel	Best For
85A	Like a shoe insole — very soft	Wearables, ultra-soft grips — needs very slow speeds
95A	Like a shopping cart wheel — firm but flexible	Phone cases, gaskets, bumpers, vibration mounts
98A+	Like a hard eraser — barely flexes	Semi-rigid structural parts

What "Additive-Free" Actually Means

Many TPU filaments include processing aids, lubricants, or filler compounds to make manufacturing easier. These additives can affect layer adhesion, surface finish, and long-term mechanical properties. Ambrosia's TPU 95 is formulated without these — what you're printing is pure TPU with nothing that doesn't need to be there.

The result is what Ambrosia calls "prints like butter" — consistent melt behavior throughout the spool, from the first meter to the last.

Eco Cardboard Spool

The spool itself is 100% cardboard — no plastic waste after the filament is used. Ships in a cardboard box, vacuum-sealed with a desiccant bag. A cleaner choice for operations that go through significant filament volume and want to reduce plastic disposal.

Technical Specifications

Property	Test Method	Value
Physical
Density	ISO 1183	1.22–1.25 g/cm³
Melt Flow Rate (250°C / 2.16kg)	ISO 1133	6–10 g/10min
Moisture Absorption	ISO 62	<0.5%
Mechanical
Tensile Strength	ISO 527	27–28 MPa
Elongation at Break	ISO 527	800–1000%
Flexural Modulus	ISO 527	6–7 MPa
Flexural Strength	ISO 178	7–9 MPa
Impact Strength	ISO 180	NB (No Break)
Thermal
HDT @ 0.455 MPa	ISO 75	95°C
Dimensional
Diameter	—	1.75mm ±0.03mm
Net Weight	—	1kg

800–1000% elongation at break is worth calling out specifically — most TPU 95A filaments achieve 400–600%. Ambrosia's formulation stretches more than twice as far before failing, which translates directly to better impact performance and longer part life in repeated-stress applications like phone cases and gaskets.

Manufacturer Print Settings (Ambrosia Recommended)

Setting	Accepted Range	Ambrosia Recommended
Nozzle temperature	190–220°C	210°C
Bed temperature	50–65°C	60°C
Build surface	Textured PEI or surface with separation layer
Part cooling fan	0–70%	Varies by printer cooling capability
Chamber temperature	40–80°C ambient	35°C target

Additional Settings for Best Results

Setting	Direct Drive	Bowden	Notes
Print speed — walls	25–50mm/s	15–20mm/s	Start slow. Extruder clicking = too fast. Back off 10mm/s and raise nozzle temp 5°C.
Retraction distance	0.5–2mm	3–5mm	⚠️ The #1 TPU mistake: too much retraction. TPU stretches instead of retracting when pulled too far. Start at 1mm direct drive, never exceed 2mm without testing.
Retraction speed	25–30mm/s	20–25mm/s	Below 20mm/s causes oozing.
Combing mode	Enable — All or Not in Skin		Keeps travel inside the print — dramatically reduces stringing without touching retraction settings.
Z-hop	Disable		Z-hop causes pressure changes that worsen blobbing in TPU.
Drying	50–55°C for 4–6 hours		⚠️ Do not exceed 70°C with the cardboard spool. TPU absorbs moisture fast — sudden stringing on a dialed-in profile almost always means wet filament.

Design Tips for TPU Parts

Wall count controls stiffness — 2 walls = soft and highly flexible. 4 walls = noticeably firmer. Tune wall count per product to hit your target feel without changing filament.
Gyroid or honeycomb infill at 15–25% for maximum flexibility. Avoid grid infill — it creates directional stiffness that ruins parts that need to flex uniformly.
Avoid supports wherever possible — removing TPU supports tears surface layers. Orient parts to eliminate overhangs before adding supports.
800–1000% elongation means you can design thinner — with this level of stretch before failure, you can use thinner walls for lighter, more flexible parts without sacrificing durability.

Who Is This For?

Makers who've been burned by inconsistent TPU — the ±0.03mm tolerance is the spec that matters when you're chasing consistent extrusion across a full spool. Generic TPU at ±0.05mm has measurably more diameter variation, which shows up as pressure fluctuations at the nozzle.
Phone case, gasket, and bumper producers who need the elongation performance to back up their product quality claims. 800–1000% elongation at break means your parts handle abuse that lower-spec TPU fails at.
Bambu Lab direct drive users (X1, P1, A1 series) who want premium TPU on their machine — bypass the AMS with the external spool holder and Bambu's direct drive toolhead handles this filament exceptionally well.
Eco-conscious operations that want to reduce plastic spool waste without sacrificing filament quality. Cardboard spool, cardboard box, vacuum-sealed freshness — the full package.
Industrial and engineering applications where ISO-certified mechanical data matters — tensile strength, flexural modulus, HDT at 95°C are documented and verifiable, not estimated.

⚠️ Safety: This filament may emit Volatile Organic Compounds (VOCs) when heated. Print in a well-ventilated area or with an enclosure vented outside. Use appropriate respiratory protection for prolonged printing sessions. Technical and Safety Data Sheets available on request.

Browse more TPU options in our TPU Flexible Filament collection. Explore all filament options in our 3D Printing Filaments guide.