colorFabb nGen_FLEX BLACK 3D Printer Filament – 1.75mm / 650g Spool

nGen_FLEX is best described as a semi-flexible material with good print-ability on most 3D printers eliminating the use for specialized flex extruders.  It’s rated at a shore hardness of 95A, and by adjusting infill and perimeter settings it’s possible to influence how flexible a part should feel after printing.

nGen_FLEX is an engineering-grade material that demonstrates excellent durability, toughness and amazing  layer-to-layer adhesion.  What makes nGen_FLEX standout from other semi-flexible materials is the great chemical resistance and temperature resistance of up to 121°C.  Enabling parts to be steam sterilized with a 123°C cycle.


In stock (can be backordered)

Material: colorFabb nGen Co-polyester – Eastman Amphora™ Flex 3D Polymer FL6000
Actual Weight of Filament: 650g (approximate length on the spool is 250 meters)
Diameter Tolerance: ± 0.1 mm
Density: 1.13 g/cm3
Glass Transition Temperature: 130°C

Suggested printing temperature: 240°C – 260°C*
Suggested print speed (Bowden Drive): 15 – 25 mm/s
Suggested print speed (Direct Drive): 25 – 60 mm/sec
Suggested heated bed temperature: 70-80°C

Build platform: colorFabb’s nGen filament adheres best to heated build platforms. We recommend using BuildTak as your bed’s printing surface.

If printing on a glass bed, apply glue-stick. A very thin layer of glue will be sufficient to keep your print nicely in place. Another gluing method is dissolving PVA glue in water. The consistency of the mixture can be quite thin, like skim milk. By applying just a few drops and smearing the mixture out before you start printing will create a very thin layer which will hold the filament down.

Always allow the bed to cool before attempting to remove parts. We recommend using a BuildTak Flex Plate for easy rapid cooling.

In-house testing
STACKER is continually testing our filaments to ensures the best quality possible. If you are not sure how to print with any material, please contact us at

Spool Size:
Outer Diameter: 200mm
Thickness: 70mm
Inner Diameter: 53mm

Tech Downloads: Technical data and MSDS sheets are available from colorFabb,

*3D printers have a wide variety of hot-ends which makes it extremely difficult to provide a universal printing temperature. The provided temperature range should be considered a starting point to help you find a temperature that works for your print. Please refer back to your printer’s operating manual for safety and temperature specifics.