PTFE Tubing with Star Internal Profile 2.2×4 mm – 1 m

Specialized PTFE tubing / tube with star-shaped interior is designed for applications where very stable and precise guiding of filament, liquids, or gases is required. The star-shaped (multi-grooved) internal profile ensures better material guiding, lower friction, and the possibility of slight compensation for diameter deviations. It is made of pure PTFE (Teflon), which is characterized by top chemical resistance and a working temperature range from approximately −60 to +260 °C. This makes it a great choice not only for 3D printing but also for laboratory, industrial, or pneumatic applications.

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Main Advantages and Use

• Star-shaped internal profile (approx. 2.2 mm) The multi-grooved shape supports stable material guiding, reduces the contact area and thus friction compared to a fully cylindrical interior.
• Outer diameter 4 mm – common standard Compatible with most quick connectors, bowden couplers, and holders for 4 mm PTFE tubes.
• PTFE material (Teflon)
  • very low coefficient of friction
  • excellent chemical resistance to most acids, bases, and solvents
  • long service life even in demanding environments
• Wide range of operating temperatures Suitable for applications in cold as well as long-term exposure to higher temperatures (typically up to approx. 260 °C at low pressure).
• Transparent white (milky) color Allows for partial visual inspection of the guided medium (filament, liquid, gas) and also blends well with most printers and devices.
• Sold by 1 m – always in one piece One unit corresponds to 1 meter of tubing, supplied as a continuous length without cutting.

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Typical Use

• 3D printers (Bowden system)
  • precise filament guiding between the extruder and the hotend
  • reduction of friction and improvement of filament feed consistency
  • especially suitable for 1.75 mm filament (depending on specific filament tolerance and star profile)
• Liquid and gas guiding
  • laboratory and measuring equipment
  • chemical applications with aggressive media
  • pneumatic systems with low to medium pressure (depending on specific pressure and conditions)
• General industrial use
  • transport of media where high chemical resistance is important
  • insulation or protective guiding of fine wires or fibers

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Technical Specifications

Parameter	Value
Material	PTFE (polytetrafluoroethylene)
Internal profile	star-shaped / multi-grooved
Nominal internal dimension	approx. 2.2 mm (star profile)
Outer diameter	4 mm
Color	transparent white (milky)
Length	1 m (one continuous piece)
Temperature resistance (approximate)	approx. −60 °C to +260 °C
Chemical resistance	very high against most chemicals
Typical use	filament, liquid, gas guiding

The values listed are typical for PTFE 2.2×4 mm tubing and may vary slightly depending on the specific production series.

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Recommendations for Installation and Use

• When shortening, use sharp cutting tools (knife, hose cutters) for a clean perpendicular cut without burrs.
• Ensure the tubing is not sharply kinked – maintain a reasonable minimum bend radius to avoid restricting flow or damaging the star profile.
• For 3D printers, regularly check the wear and cleanliness of the interior of the tubing, especially when using abrasive filaments (filled with metal, carbon, wood).
• To achieve optimal function in a Bowden system, it is recommended to combine with high-quality quick connectors and a precise extruder.

This PTFE tubing with a star-shaped interior is an ideal choice if you are looking for stable and reliable filament or media guiding with minimal friction and maximum service life.

Key Features:

• Star-shaped internal opening (2.2 mm) for more stable guiding and lower friction
• Standard 4 mm outer diameter suitable for common quick connectors and bowden systems
• High-quality PTFE (Teflon) with excellent chemical and temperature resistance
• Transparent white color allowing partial control of the flowing medium
• Ideal for precise 1.75 mm filament guiding in 3D printers
• Supplied as 1 m of tubing in one continuous piece