Capricorn XS Series PTFE Bowden Tubing for 1.75mm Filament

One Meter of our flagship PTFE Tubing, enhanced with a proprietary blend of high performance additives. 1.9mm inner, 4mm outer diameter for 1.75mm filaments.

This is, hands down, the single best PTFE Bowden tubing you can buy for your home 3D printer.

Each meter of tubing comes with one Capricorn sticker to decorate your printer.

Our Premium XS Series Dark Blue Tubing
Additives	Blue Color and Secret High Lubricity Additive Mixture
Best For Chunky Filaments	YES
Best For Flexible Filaments	YES
Can See Through	NO
Pulling Friction♠	0.8
Color	Dark Blue
Density (kg/m3)	2300 +/-100
Hardness	60-65
Inner Diameter (mm)	1.90 +/- 0.05
Linear Thermal Expansion at 250 °C	2.2-3.3%
Material	Highest Quality Pure Virgin PTFE
Melting Point (°C)♥	up to 340
Outer Diameter	3.95 +/- 0.05
Roundness (ϵ)	< 0.1
Stiffness§	Medium High
Thermal Conductivity (W/m-k)	0.25
Wear Rate (gm/s)	0.01
Young’s Modulus (GPa)¥	0.53

♠Pulling Friction is calculated as the average force required to pull 1.2 meters of 1.75mm PLA filament through 1 meter of tubing at a constant speed, relative to 1 meter of cheap white reference tubing. Note that although we observed the friction of the TL series to be about the same or even slightly lower than our XS series, it also has a larger internal diameter.

§Other Bowden tubes may vary significantly in stiffness, depending on the material from which they’re made. Our tubing generally tends to be more flexible than most, with the TL being more flexible than XS.

¥Young’s Modulus (YM) is the measure of elasticity of the material. Our XS Series additives give the PTFE a slightly greater YM than the TL Series.

♥Temperatures were approximated by heating samples of all tubing simultaneously, observing how quickly each one began to deform. Printer failures may happen at significantly lower temperatures.

• Brand: Capricorn
• Length: 1 Meter
• ID: 1.95mm ± 0.05mm
• OD: 4.0mm