filament joiner
Skip itSoft demand (-47.6% this quarter) — this niche doesn't clear our bar today.
Quality gap
Incredible4.0★avg incumbent rating — lower means beatable quality
Avg price
Great£21.35avg listing price — sweet spot $15–$100
Review moat
Good555.43avg incumbent reviews — the moat a new listing must climb
Returns
Good2.0%return rate — above 5% kills the launch gate
Price range
Good£6.46–£36.82cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good4.6%search→purchase rate — share of searches ending in a sale
Market size
Bad£32K£32K/yr · 32K searches
Brand share
Bad97%top-5 brand share — brand-locked demand
Competition
Bad93%top-5 click share — a locked-up shelf
Growth
Bad-47.6%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, filament joiner is a £32K/yr Amazon United Kingdom market (32K searches/yr). The top 5 brands hold 97% of demand. Verdict: Skip it — 37/100.
Data updated Jul 21, 2026 · scored weekly · How we score niches
filament joiner market data
- Units sold / yr
- 1K–2K
- avg 100–250/product
- Revenue / yr
- £27K–£32K
- units × avg price
- Conversion rate
- 4.6%
- Avg BSR
- #632
- Page quality
- 0%
- Prime
- 86%
- Sponsored
- 71%
- Out of stock
- 22.2%
- Avg brand age
- 25 months
- Avg seller age
- 227 days
Competition & brand share
The top 5 products capture 93% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 flat
Sellers
10
Top-5 brand share
97%
Top 20: 100%
Top-5 click share
93%
Top 20: 100%
Open market
0%
- SUNLU58%
- YOOPAI20%
- kunphy9%
- Hyuduo6%
- VIT SPORT4%
- CQEAZ3%
Demand
Weekly Amazon search volume, last 32 weeks — -47.6% search growth over the last 90 days.Top filament joiner search terms
- filament joiner15K/yr
- filament connector7K/yr
- sunlu filament connector7K/yr
- filament splicer4K/yr
Top filament joiner 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.
All 7 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
SUNLU Official Filament Joiner Filament Connector with 200 PCS PTFE Sleeve for 3D Printer Filament 1.75mm 240C Fast Heating Compatible with PLA PETG TPU ABS PA Nylon Easy to Use
SUNLU£28.164.3★1,305 rev
Filament Joiner SUNLU Filament Connector with 200PCS PTFE Sleeve for 3D Printer Filament 1.75mm 240C Fast Heating Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI£30.944.2★1,152 rev
PTFE 600Pcs Suitable for SUNLU Filament Connector 3D Printer Filament 1.75mm Easy to Use High Temperature Resistance up to 240 Thread Welder Compatible with PLA PETG and ABS
kunphy£11.854.6★125 rev
Filament Welder Connector Premium Aluminum Alloy 3D Printer Filament Connector Sensor for Reliable Multi Color Printing and Broken Filament Repair 1.75mm Red
Hyuduo£6.463.2★9 rev
YOOPAI Filament Joiner Filament Connector with 400PCS PTFE Tubes Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI£36.824.2★1,152 rev
Newest
by launch date
CQEAZ 1.75MM Filament Welder Connectors Joiner PTFE Tubes Filaments Splicer Welding Tubes 100/200pcs for 3D Printer Filament Welder
CQEAZ£8.033 rev
VIT SPORT Filament Connector - Ultimate 1.75mm 3D Printer Filament Splicer Up to 240C Fuser & Joiner Compatible with PLA ABS TPU PETG PA/PC Includes 200 Silicone Tubes
VIT SPORT£27.17142 rev
YOOPAI Filament Joiner Filament Connector with 400PCS PTFE Tubes Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI£36.821,152 rev
PTFE 600Pcs Suitable for SUNLU Filament Connector 3D Printer Filament 1.75mm Easy to Use High Temperature Resistance up to 240 Thread Welder Compatible with PLA PETG and ABS
kunphy£11.85125 rev
Filament Joiner SUNLU Filament Connector with 200PCS PTFE Sleeve for 3D Printer Filament 1.75mm 240C Fast Heating Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI£30.941,152 rev
Trending
90-day click momentumFilament Welder Connector Premium Aluminum Alloy 3D Printer Filament Connector Sensor for Reliable Multi Color Printing and Broken Filament Repair 1.75mm Red
Hyuduo£6.463.2★
PTFE 600Pcs Suitable for SUNLU Filament Connector 3D Printer Filament 1.75mm Easy to Use High Temperature Resistance up to 240 Thread Welder Compatible with PLA PETG and ABS
kunphy£11.854.6★
CQEAZ 1.75MM Filament Welder Connectors Joiner PTFE Tubes Filaments Splicer Welding Tubes 100/200pcs for 3D Printer Filament Welder
CQEAZ£8.033.2★
SUNLU Official Filament Joiner Filament Connector with 200 PCS PTFE Sleeve for 3D Printer Filament 1.75mm 240C Fast Heating Compatible with PLA PETG TPU ABS PA Nylon Easy to Use
SUNLU£28.164.3★
YOOPAI Filament Joiner Filament Connector with 400PCS PTFE Tubes Sleeve for 3D Printer Filament 1.75mm Fast Heating Up to 240C Filament Splicer Compatible with PLA PETG TPU ABS PA Nylon
YOOPAI£36.824.2★
What buyers say about filament joiner
What buyers praise and complain about, mined from review topics.What buyers love
“Does the job”
“Build quality feels good for a workshop tool”
“easy to use”
“if your looking for s filament joiner then they this one works perfect and highly recommend”
“that can be easily printed off”
“ent connector”
“great item to use use odd bits of filament”
“Saves waste FDM”
“Great Value Kit”
“It's also fun to stitch together random colours of filament”
What buyers complain about
“Not easy to use”
“It is actually very very small”
“They are too thick to use in the machine”
“Doesnt turn on”
“could be improved”
“Doesnt turn on”
“if a little pricey”
Top return reasons
Common questions
- Is filament joiner profitable to sell on Amazon United Kingdom?
- The niche generates £32K/yr across 7 tracked products. 90-day search growth is -47.6%. Flapen's verdict: Skip it (37/100).
- How competitive is the filament joiner niche?
- 6 brands and 10 sellers compete. The top 5 products take 93% of clicks and top 5 brands hold 97% of demand.
- What do buyers complain about in filament joiner?
- Top complaints mined from reviews: Ease Of Use, Size-Overall, Thickness. The return rate is 2.0%.
- What does it cost to enter the filament joiner niche?
- Listings span £6.46–£36.82; the average listing price is £21.35 (sweet spot $15–$100). The average incumbent carries 555 reviews — the moat a new listing must climb.