Creality PTFE tubes for CFS D4 × d2.5 – PTFE

Original Creality PTFE tubes with an outer diameter of 4 mm and an inner diameter of 2.5 mm, designed for the Creality CFS (Creality Filament System) – an automatic material feeder/changer for Creality printers.

Thanks to precise internal tolerances and high-quality PTFE material, these tubes ensure stable filament feeding, low friction, and a minimized risk of jams along the path between the CFS, buffer, and extruder.

These tubes are suitable for 1.75mm filament and are primarily used as connecting Bowden guides between the CFS unit, buffer, and printer.

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Main features

• Designed for Creality CFS
  Compatible with Creality CFS systems used on printers such as K1, K1C, K1 Max, K2 Plus, and other models with a CFS unit.
• Size D4 × d2.5 mm
  Outer diameter 4 mm for standard quick-connect fittings (PC4) and inner diameter 2.5 mm for safe and reliable guidance of 1.75mm filament in longer CFS paths.
• High-quality PTFE material
  Made from PTFE with a low coefficient of friction, good chemical resistance, and high temperature stability – suitable for the typical temperatures around the CFS and printer.
• Smooth filament feeding
  The smooth inner surface reduces friction and resistance during movement, which is especially important for multi-material and multi-color printing, where frequent filament changes occur.
• Original Creality accessory
  Guaranteed compatibility with original Creality parts, correct diameter for CFS connectors, and reliable operation without additional modifications.

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Benefits of use

• Lower resistance in the Bowden path → fewer jams and smoother retractions during filament changes
• Improved CFS reliability → reduced risk of errors such as “cannot extrude”, where the filament rubs inside the tube
• Easy replacement → simple shortening or replacement of worn sections of the PTFE tube
• Compatibility with standard fittings → standard PC4 quick-connect (push-fit) fittings on the CFS, buffer, and printer

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Recommendations for use

• When replacing the PTFE tubes, check the connectors (push-fit/PC4) and replace them if they no longer hold the tube properly.
• Cut the tube ends perpendicular and cleanly (ideally with a sharp knife or a dedicated PTFE tube cutter) so they seat properly in the connectors and do not obstruct filament passage.
• Make sure the path between CFS – buffer – printer is not overly bent; the natural curve of the tube helps reduce resistance.

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Technical parameters

Parameter	Value
Product type	PTFE tubes for CFS
Manufacturer	Creality
Material	PTFE (polytetrafluoroethylene)
Intended use	Filament guidance for Creality CFS systems
Outer diameter (D)	4 mm
Inner diameter (d)	2,5 mm
Compatible filament diameter	1,75 mm
Color design	Typically white (depending on batch)
Application area	Connecting Bowden between CFS, buffer, and printer

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Who this product is suitable for

• Owners of Creality K1 / K1C / K1 Max / K2 Plus printers and other models with a CFS system
• Users who want to replace or shorten the original PTFE tubes
• Those dealing with increased filament resistance or feeder skipping along the path between the CFS and extruder

Properly dimensioned and high-quality PTFE tubes are crucial for trouble-free operation of the CFS – especially for longer filament paths and frequent color or material changes.

Key features:

• Original Creality PTFE tubes designed for the CFS (Creality Filament System)
• Size D4 × d2.5 mm – suitable for 1.75mm filament and standard PC4 connectors
• Low friction and a smooth inner surface for reliable filament feeding
• High-quality PTFE material with good chemical and temperature resistance
• Improves reliability and consistency of filament feeding between the CFS, buffer, and printer
• Simple and quick replacement of worn or damaged tube sections