| Size:.75kg NinjaFlex, a premium TPE (thermoplastic elastomer), performs with an exciting combination of elongation and elasticity. Simply put, it is the stretchiest material we've ever tested. NinjaFlex is a soft flexible filament that comes in 11 different colors that look beautiful after being printed. This filament's soft flexibility, especially combined with its ability to bind to ABS when using a LulzBot FlexyDually Tool Head, make it ideal for prosthetics, costumes, wearables, cell phone cases, and other projects requiring flexible, elastic 3D printed items. NinjaFlex can be printed on all LulzBot printers, however it is so flexible it requires either the Flexystruder or FlexyDually Tool Head for optimal printing results.