We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Ten blue PTFE tubes with brass and steel push-fit connectors on a light background

KEHIPI

KEHIPI 10pcs PC4-M10 M6/M10 PTFE Bowden Fitting Kit 3D Printers Accessory

SKU CH-4KT0-CA3QT

A 10-piece kit with 3 metres of blue PTFE tubing and mixed M6/M10 push-fit connectors for 1.75 mm filament printers

  • Color10*PC4-M10
  • 10-piece kit equips multiple Bowden upgrades
  • 5 m PTFE tube per piece cuts to exact length
  • 0 mm inner diameter matches 1.75 mm filament precisely
  • Copper M6 and stainless M10 fittings resist wear and corrosion
  • Blue PTFE tube handles 2.15–2.20 g/cm³ density for smooth feeding

Bowden Fitting Kit for 1.75 mm Filament

This kit supplies ten push-in connectors and PTFE tubing for Bowden extruders on 1.75 mm filament printers. It includes four PC4-M6 brass fittings with 6 mm threads, four PC4-M10 stainless-steel fittings with 10 mm threads, and two 1.5 m lengths of blue PTFE tube sized at 2 mm inside diameter and 4 mm outside diameter. The tube is rated at a density of 2.15 to 2.20 g/cm³.

Compatibility and Limitations

The components suit printers that accept 4 mm OD PTFE tubing and use either M6 or M10 threaded hot-end or extruder ports, covering models such as Ender-3, Ender-3 V2, Ender-2, CR-10 and Monoprice Mini variants. Builders whose machines require a different tube outer diameter, alternative thread pitches, or proprietary quick-connect styles will need other parts. The kit does not address direct-drive setups that omit Bowden tubing.

Deciding Specification — Tube Inside Diameter

The 2 mm bore of the supplied PTFE tube is the critical dimension that determines whether 1.75 mm filament feeds reliably without binding or excessive friction. If a printer's filament path demands a larger or smaller internal diameter, this tubing will not work correctly.

Highlights

  • 10-piece kit equips multiple Bowden upgrades
  • 5 m PTFE tube per piece cuts to exact length
  • 0 mm inner diameter matches 1.75 mm filament precisely
  • Copper M6 and stainless M10 fittings resist wear and corrosion
  • Blue PTFE tube handles 2.15–2.20 g/cm³ density for smooth feeding

Specifications

BrandAITRIP
Model10*PC4-M10
Color10*PC4-M10

Questions about this item

Will the 10mm thread PC4-M10 fittings replace the original couplers on my Ender 3 V2 Bowden extruder?

Yes, the PC4-M10 fittings have a 10mm thread and 4mm inner diameter that match the stock Bowden couplers on Ender 3 and Ender 3 V2 printers.

How can I confirm the blue PTFE tube is seated correctly in the stainless-steel PC4-M10 fittings after installation?

Push the 4mm OD tube into the black end until it hits the internal stop; the collet teeth will grip the tube and a gentle pull should not release it.

Does the 10-piece kit include both the 3-metre blue PTFE tube and the tube cutter, or must I buy them separately?

The kit supplies two 1.5m blue PTFE tubes (3m total), four PC4-M6 fittings, four PC4-M10 fittings and one PTFE tube cutter — everything needed for a Bowden rebuild.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.