NinjaFlex TPU 3D Printing Filament – 1.75mm .50kg – FIRE

NinjaFlex flexible filament leads the industry thanks to its superior flexibility and longevity compared to non-polyurethane materials. Its consistency in diameter and ovality (roundness) outpaces other polyurethane materials.

Made from a specially formulated thermoplastic polyurethane (TPU) material, this patented technology boasts a low-tack, easy-to-feed texture. The result is uniquely flexible, strong prints ideal for direct-drive extruders.

Suggested Applications: Seals, gaskets, plugs, leveling feet, protective applications.


  • Shore Hardness = 85A
  • Truly flexible (no fill or layer manipulation required to achieve performance)
  • 660% elongation allows for repeated movement and impact without wear or cracking 
  • Polyurethane composition allows for excellent vibration reduction
  • Patented low friction exterior allows for smooth feeding
  • Abrasion resistance 20% better than ABS and 68% better than PLA
  • Consistent diameter and material properties providing reliable, high quality prints
  • Chemical resistant to many materials, including naphtha, ASTM Oils #1-3, petroleum and freon
  • Adheres to all standard build platforms without glue or tape
  • REACH and RoHS 2002/95/EC Directive compliant


  • Extruder Temperature:  225°C – 235°C
  • Platform Temperature: Room temperature – 40°C
    Glue and/ or blue painters tape is suggested if not using a heated bed.
  • Print Speed: 
    Top and bottom layers: 10-20 mm/ sec (600-1200 mm/ min)
    Infill speeds: 15-35 mm/ sec (900-2100 mm/ min)
    Layer 2+ use cooling fan if available.

Product Features

  • Truly flexible – no fill or layer manipulation required to achieve performance
  • 660% elongation allows for repeated movement & impact without wear or cracking
  • Excellent vibration reduction
  • Shore Hardness = 85A
  • Suggested Applications: Seals, gaskets, plugs, leveling feet, protective applications.

Check Out Our Website For Details…


  • Philip Edelbrock

    Fun stuff, lots of interesting applications. OK, I have to give this 5 stars but it’s not perfect. But, the give and takes are a balance. This is an ‘Expert’ material for a reason. 3D printing the softest rubber is an amazing feat on a consumer-level machine (I’m on a Taz 6 with the Flexystruder v2 head). Any softer and you need to print molds and pour.This material has to print slow and you have to design your print carefully. You aren’t going to get amazing detail with it, but it is quite cool and fun. Doesn’t smell…

  • J. Soper

    WOW what a great product. Better than I expected, but still has its drawbacks.First, I am using this on a Monoprice Mini Select V2 3D printer. It’s a Bowden style extruder, so I had to print a spacer to fit ahead of the PTFE tube so the filament will extrude without looping onto itself. It really is the consistency of something like al dente cooked spaghetti.Initially I was able to print at 210C with a 40C heated bed. The next time I tried, it didn’t want to extrude at that temperature so I upped…

  • Anonymous

    I had purchased this to “play with”. I had not project in mind. I was just wanting to test it. out. It was a great find. I used this on my Makerbot Replicator 2 and it printed better that the PLA. I printed with the default standard setting with only changing the temp to 225. I used the plastic build platform that came with the maker bot with no tape.There were a few threads attached from moves. These artifacts were simple to remove with a pair of diagonal cutters. Don’t try…

Leave a Reply

Your email address will not be published.