1.75 mm EEL conductive flexible filament, Midnight Black


Eel is the first truly conductive and flexible filament from NinjaTek. With the same reliable printing specs as the rest of the NinjaTek line, Eel adds conductive properties to allow for even more uses for flexible filament.

Buy - Prices VAT included
Sample (4 meters) €10,00
10 meters €18,00
15 meters €25,00
Spool 500 g €95,00

Flexible and conductive filament in black.


  • Truly flexible conductive material
  • Low friction exterior allows smooth feed through filament guides
  • High elasticity (355% elongation allows for repeated movement without wear or cracking)
  • Shore Hardness 90A
  • Chemical resistance to many materials
  • Excellent build platform adhesion and bonding between layers

Tech specifications

Nominal diameter 1.75 mm
Warp n.a.
Flexibility very high
Break resistance very high
Printing temperature ~ 220-230 °C
Temperature resistance n.a.


Printing with heated bed is better, if available set it between 0-45 °C. Glue or blue tape is suggested if not using a heated bed.
Suggested print speed: for top and bottom layers around 15-20 mm/s, for infill around 45-60 mm/s. If available use cooling fan after the second layer.

Electronic traces, integrated flexible wire, anti-static grippers, conductive wearable products.

NinjaTek Eel conductive properties

When switching from another polymer (such as ABS or PLA) purge thoroughly before starting a print. As with other materials, when preheating, use a lower temperature (~180-200°C) to prevent excess material from draining prior to starting a print.

While NinjaFlex® is resistant to most oils, it is highly affected by solvents, acids, and fuels such as gasoline. If the printed part should need to be cleaned, a mild soap solution is recommended.

Due to all the different types of hot-end it's extremely difficult to give a temperature advice. Please consider our tips as a starting point to find the temperatures that work well in your setup. You may have to adjust the temperature settings slightly based on your type of printer.