Attributes

Brand	-
Category	Root / Baby & Toddler Essentials
Origin	-
Material	Stainless Steel with PTFE Lining
Thread Size	M6
Total Length	35mm
Compatibility	MK8 Direct Drive Extruders
Inner Diameter	4.0mm (PTFE lined)
Outer Diameter	6.0mm
Package Quantity	5 Pieces per Pack
Surface Finish	Polished Stainless Steel
Temperature Resistance	Up to 240°C (PTFE limit)
Application	FDM 3D Printer Hotend Upgrade

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Solved my clogging issues

I was experiencing frequent clogs with my stock throat tube. Switching to these extended PTFE lined tubes completely eliminated the problem. Highly recommended for direct drive conversions.

Anonymous

Mar 22, 2026

Rating: 5/5

Perfect fit for my direct drive setup

These throat tubes are exactly what I needed to extend the heat break on my custom direct drive extruder. The M6 threading is precise and the PTFE lining is smooth, ensuring filament feeds without resistance.

Anonymous

Mar 21, 2026

Rating: 4/5

Good quality, slightly long for some heads

The stainless steel quality is excellent and feels durable. Just make sure your hotend assembly has enough clearance for the full 35mm length. Works great for PLA and PETG.

Anonymous

Mar 08, 2026

Rating: 3/5

Works but requires careful installation

The product itself is fine, but you need to be very careful not to overtighten since the PTFE liner can deform if crushed. Follow torque specifications carefully.

Anonymous

Mar 03, 2026

Rating: 5/5

Precision machined

You can tell these are well-machined. The threads engage smoothly without cross-threading, and the internal bore is perfectly centered. Great value for a 5-pack.

Anonymous

Mar 02, 2026

Rating: 5/5

Great upgrade part

Easy to install and immediately improved my print consistency. The extra length helps keep the filament cool longer before it reaches the melt zone.

5 FAQ

Q: Can I use this with flexible filaments like TPU?

A: Yes, the smooth PTFE lining makes these excellent for flexible filaments as it reduces friction and the chance of the filament buckling inside the throat.

Q: What is the maximum temperature these can handle?

A: Since these are PTFE lined, we recommend keeping temperatures below 240°C to prevent degradation of the liner. For high-temperature materials like ABS or Polycarbonate, an all-metal throat is suggested.

Q: Is the 35mm length measured including the threads?

A: Yes, the total length of 35mm includes the threaded portion and the smooth barrel section combined.

Q: Does this come with a heatsink or just the tube?

A: This package includes only the stainless steel throat tubes. Heatsinks, fans, and heater blocks are sold separately.

Q: Are these compatible with E3D V6 hotends?

A: These are designed specifically for MK8 style direct drive extruders with M6 threading. They may not fit E3D V6 hotends which typically use different throat dimensions.

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