colorFabb nGen_FLEX GREY 3D Printer Filament – 650g


In stock (can be backordered)

nGen_Flex is a semi-flexible material with just the right amount of flex.  Although semi-flexible filaments will work with Stacker's Bowden tube system, you must print semi-flexible filaments slowly.  For improved performance with flexible materials, we highly recommend purchasing our filament drive upgrade which has been specifically designed for improved performance with flexible filaments (available early 2017).



nGen_FLEX is best described as a semi-flexible material with good printability on most 3D printers eliminating the use for specialized flex extruders. It’s rated at a Shore A hardness level of 95. 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 great 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 121C. Enabling parts to be steam sterilized at 123C cycle.

Excellent diameter tolerance
ColorFabb uses sophisticated and highly precise laser measuring systems to check the diameter of the filament in real time during the actual production process. It’s measured over 1000 times per second and this helps guarantee that each spool of filament is produced within tolerance. We can guarantee 0.05mm +/- for our 1.75mm diameter filament, which means you can be rest assured that your printer is extruding the exact amount of material called for.

Climate Controlled Warehouse
STACKER warehouses its filaments in a climate controlled room to protect them heat and moisture which can degrade the life and performance of some filaments.

In-house testing
ColorFabb filaments have been rigorously tested at both STACKER and colorFabb facilities on Stacker 3D printers, and this ensures the best results possible. The colorFabb test lab features a wide range of popular 3D printers, including several STACKER 3D printers. They are continuously testing on 3D printers to ensure the filament is performing in real world situations. If you’re not sure how to print with our materials on your 3D printer, please contact us at or

Material science
ColorFabb was founded as a brand of Helian Polymers, a sister company of Peter Holland which have been active in the master batch and additives for the plastics processing industry. Both companies eat sleep and dream about 3D printing, and our passion drives us to create the best user experience possible.

Suggested printing temperature:
235 to 255°C‡
Suggested print speed on Stacker:
15 – 25 mm/s
Suggested print speed with improved drive:
15 – 45 mm/s
Suggested heated bed temperature:
65 – 80°C

3D printers have lots of different types of hot-end which makes it extremely difficult to give universal temperature advice. We feel our temperature advice holds for most 3D printers, but should be considered as a starting point for you to find the temperatures that work in you setup. Don’t be afraid to go either higher or lower than our advised temperatures if you feel your set-up needs this. Please refer back to your printer’s operating manual for safety and temperature specifics.

Spool Size – 650g
Outer Diameter: 200mm
Thickness: 70mm
Inner Diameter: 53mm

Box Size

Tech Downloads
For technical data and MSDS sheets please follow this link:

The information below reflects shipping weight and dimensions (if applicable)

Weight 2.2 lbs