Is filament spool profitable to sell on Amazon United States?

The niche generates $154K/yr across 29 tracked products. 16 of 22 products launched in the last 360 days are still selling. 90-day search growth is -9.3%. Flapen's verdict: Worth a look (50/100).

How competitive is the filament spool niche?

10 brands and 16 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 92% of demand.

What do buyers complain about in filament spool?

Top complaints mined from reviews: Value For Money, Size-Overall, Color. The return rate is 0.9%.

What does it cost to enter the filament spool niche?

Listings span $9.30–$40.85; the average listing price is $18.01 (sweet spot $15–$100). The average incumbent carries 233 reviews — the moat a new listing must climb.

filament spool

Worth a look

Shows low returns (0.9%), but brand-locked demand (top 5 brands take 92% of clicks) keeps it on the watch list.

Returns

Incredible0.9%

return rate — above 5% kills the launch gate

Review moat

Great232.86

avg incumbent reviews — the moat a new listing must climb

Avg price

Great$18.01

avg listing price — sweet spot $15–$100

Price range

Great$9.30–$40.85

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Good5.5%

search→purchase rate — share of searches ending in a sale

Competition

Good47%

top-5 click share — leaders hold, buyers still browse

Market size

Okay$154K

$154K/yr · 155K searches

Quality gap

Okay4.6★

avg incumbent rating — lower means beatable quality

Growth

Bad-9.3%

90-day search growth — must beat 0% to launch

Brand share

Bad92%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, filament spool is a $154K/yr Amazon United States market (155K searches/yr). The top 5 brands hold 92% of demand. Verdict: Worth a look — 50/100.

Data updated Aug 6, 2026 · scored weekly · How we score niches

filament spool market data

Units sold / yr: 8K–10K; avg 100–250/product
Revenue / yr: $144K–$180K; units × avg price
Conversion rate: 5.5%
Avg BSR: #337
Page quality: 0%
Prime: 100%
Sponsored: 97%
Out of stock: 5.5%
Avg brand age: 24 months
Avg seller age: 117 days

Competition & brand share

The top 5 products take 47% of clicks — established leaders, but buyers still shop beyond them.

Brands

10 falling

Sellers

Top-5 brand share

92%

Top 20: 100%

Top-5 click share

47%

Top 20: 89%

Open market

MarsWork73%
Biaysan7%
UniTak3D6%
ANYCUBIC4%
Howarx3%
Asbrot2%
Open — no brand owns it (4 brands, 6%)

Demand

Weekly Amazon search volume, last 8 weeks — -9.3% search growth over the last 90 days.

Open Trend

Top filament spool search terms

filament spool38K/yr -14.1%5.8% conv.
marswork pla13K/yr +16.7%1.3% conv.
marswork filament10K/yr +61.2%0.8% conv.
reusable filament spool24K/yr -34.4%4.3% conv.
marswork8K/yr +77.8%1.6% conv.
3d printer spool9K/yr -15.3%4.3% conv.
reusable spool8K/yr -26.1%3.9% conv.
3d printer filament spool5K/yr +1.0%3.5% conv.
filament spool adapter7K/yr -31.4%1.6% conv.
filament spools5K/yr -9.8%4.2% conv.

All search terms

Top filament spool products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

MarsWork Quick-Swap Reusable Spool for Refill Filament Two-Finger Press Design Compatible with Bambu Lab 3D Printers

MarsWork$15.374.8★363 rev

MarsWork Quick-Swap Reusable Spool for Refill Filament Two-Finger Press Design Compatible with Bambu Lab 3D Printers 4 pcs

MarsWork$32.904.8★363 rev

Original AMS Detachable Filament Spool Compatible with Bambu Lab 3D Printer Reusable Filament Reel Holder Fits PLA PETG ABS Filament Spool for Bambulab A1/A1 Mini Support Low-Temp Environment 70C

UniTak3D$16.984.8★359 rev

Original Reusable Split Spool for Bambu Lab AMS Gray-White or Transparent Compatible with X1/P1/A1 Series Tool-Free Modular Design

Biaysan$17.924.8★41 rev

MarsWork PLA Filament 1.75mm PLA 3D Printer Filament(Refill) 1kg Refill for Reusable Spools(2.2lbs) Premium Quality 3D Printing Filament for Bambu lab 3D Printers Black

MarsWork$14.624.4★181 rev

Newest

by launch date

MarsWork Quick-Swap Reusable Spool for Refill Filament Two-Finger Press Design Compatible with Bambu Lab 3D Printers Empty Filament Spool 2 pcs

MarsWork$18.87379 rev

3mo ago

Buhobha Quick Change Reusable Spool with a Rotating Latch Design Compatible with the Bambulab A1/A1 Mini Suitable for PLA PETG and ABS filaments Temperature Resistance: 70

Buhobha$9.309 rev

3mo ago

Asbrot Quick Detachable Reusable 3D Printer Spool for Filament Refill(1Kg)

Asbrot$9.3510 rev

4mo ago

MarsWork Quick-Swap Reusable Spool for Refill Filament Two-Finger Press Design Compatible with Bambu Lab 3D Printers 4 pcs

MarsWork$32.90363 rev

4mo ago

MarsWork Matte Burgundy PLA Filament with Quick-Swap Reusable Spool 1kg (2.2lbs) 1.75mm 3D Printing Filament Compatible with Bambu Lab 3D Printers

MarsWork$21.37379 rev

5mo ago

What buyers say about filament spool

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall19%

“Good quality”

Value For Money10%

“Cheaper”

Ease Of Use10%

“Easy to use”

Size-Overall8%

“the fit is solid”

Advertised Vs Actual Product8%

“Work as advertised”

Color7%

“Really nice color”

Strength6%

“the spool feels sturdy”

Compatibility-Overall6%

“Compatable”

Design-Overall3%

“The construction quality also feels genuinely good in hand”

Durability3%

“durable in hand”

What buyers complain about

Value For Money13%

“if a little overpriced”

Size-Overall10%

“the fit can sometimes be too tight or a little loose”

Color8%

“The color isn't bright”

Quality-Overall6%

“lacks some finesse of the higher end versions out there”

Durability6%

“does not hold for long”

Strength6%

“Very brittle”

Advertised Vs Actual Product3%

“lists a bunch off”

Flexibility3%

“the sides bend a lot”

Print Quality3%

“The only minor issue I had was getting some of this flaky shard looking dust coming off the prints”

Adhesion/Stickiness1%

“The adhesion is terrible”

Top return reasons

Size-Overall42%

Value For Money18%

Compatibility-Overall13%

Advertised Vs Actual Product8%

Color7%

Functionality-Overall6%

Print Quality1%

Strength1%

Defective Material/Parts1%

Quality-Overall1%

Common questions

Is filament spool profitable to sell on Amazon United States?: The niche generates $154K/yr across 29 tracked products. 16 of 22 products launched in the last 360 days are still selling. 90-day search growth is -9.3%. Flapen's verdict: Worth a look (50/100).
How competitive is the filament spool niche?: 10 brands and 16 sellers compete. The top 5 products take 47% of clicks and top 5 brands hold 92% of demand.
What do buyers complain about in filament spool?: Top complaints mined from reviews: Value For Money, Size-Overall, Color. The return rate is 0.9%.
What does it cost to enter the filament spool niche?: Listings span $9.30–$40.85; the average listing price is $18.01 (sweet spot $15–$100). The average incumbent carries 233 reviews — the moat a new listing must climb.