Description
A print fails at hour nine, and the remaining spool holds two hours of material. The spools are half-empty, the colour is right, and the part is not finished. That is the moment a filament joiner stops being an accessory and starts being the difference between a completed job and a restart.
These PTFE splice tubes join two filament ends into a single continuous strand. The internal bore is sized for 1.75 mm filament, the wall is thick enough to guide the material into the hotend without kinking, and the cut ends sit flush inside the tube so the transition passes the extruder gear without catching. Each tube measures 37 mm in length with a 1.8 mm inner diameter and a 2.6 mm outer diameter.
PTFE is the right material here because it is slick and heat tolerant. Filament slides through with minimal friction, and the tube does not soften or deform in the short distance between the spool and the extruder. The result is a splice that behaves like continuous filament rather than a repair.
Workshops that run long print queues keep a stock of these on the shelf next to the nozzles. It is a consumable that costs very little per print and removes an entire class of wasted jobs.
Waste is a spool you never finished. This closes the gap.
Key Features
- ✦ Tubing sized specifically for 1.75 mm filament with a 1.8 mm bore and 2.6 mm outer diameter
- ✦ PTFE construction for low friction and reliable heat tolerance near the hotend
- ✦ 37 mm length guides the splice through the extruder without catching on the drive gear
- ✦ Turns partial spools into usable continuous material and cuts failed-print waste
- ✦ Available in 100-piece and 200-piece quantities for workshop restocking
- ✦ Press-fit splice design, no adhesive or heating required
- ✦ Fits common direct drive and Bowden extrusion setups
Technical Specifications
- Material: PTFE tubing
- Inner Diameter: 1.8 mm
- Outer Diameter: 2.6 mm
- Length: 37 mm per tube
- Filament Compatibility: 1.75 mm PLA, PETG, ABS and TPU
- Quantity Options: 100 pieces or 200 pieces per pack
- Splice Method: Press-fit, no glue or heat required
- Colour: Natural white PTFE
- Storage: Keep in a dry container away from dust
- Best For: Spool joining, print recovery, workshop consumables
Where It Fits
Print farms use these to finish every metre of a spool instead of discarding the last quarter. Hobbyists keep a handful near the printer for the moment a print is running low. Prototyping labs running colour changes splice segments rather than loading a new spool for a short test. Schools and makerspaces buy the 200-piece pack because student printers go through filament unpredictably and waste is the largest hidden cost in the room.
Frequently Asked Questions
Q: Will the splice pass through a Bowden tube?
A: Yes. The outer diameter is 2.6 mm, so the tube slides through standard Bowden setups and the extruder path.
Q: Do I need a filament welder to use these?
A: No. The splice is press-fit. Trim both filament ends square, push them into the tube until they meet, and the splice is complete.
Q: What diameter filament does this fit?
A: It is sized for 1.75 mm filament, which is the most common desktop printer standard.
Q: How many tubes do I get?
A: Orders are available as 100-piece and 200-piece packs, and each tube handles one splice.
Q: Does the tube deform inside a heated enclosure?
A: PTFE tolerates the temperatures of a typical enclosed printer. The tube sits upstream of the hotend where heat exposure is limited.
How It Compares
| Consideration | This Set | Ordinary Alternatives |
|---|---|---|
| Bore tolerance | 1.8 mm bore sized for 1.75 mm filament | Loose tubing that lets the splice slip |
| Material | PTFE, low friction and heat tolerant near the hotend | PVC that softens with heat |
| Tube length | 37 mm, guides the splice past the drive gear | Short tubes that catch in the extruder |
| Pack size | 100 or 200 pieces for workshop restocking | Ten-piece packs at a higher unit cost |
Why It Matters
Splice quality depends on the bore tolerance of the tubing. Loose tubing lets the filament ends separate under extruder tension and the print fails a second time, which is the worst possible outcome because it costs the same hours twice. Tight tubing solves the problem quietly and permanently.
More Questions From Buyers
Q: Do I need to cut the filament ends straight?
A: A square cut makes the splice much more reliable. Trim both ends flat with side cutters so they butt together inside the tube with no gap.
Q: Can these be reused?
A: A tube holds one splice. Once filament is pressed inside, the grip is set, so treat them as a consumable and keep a stock on the shelf.
The EastSupplier Promise
Every unit is inspected before it leaves the warehouse, packed for international transit, and backed by a responsive support team. If a shipment arrives damaged or does not match the specification below, we replace it. Sourcing at scale should not require guesswork.
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