Soft Filaments of High Elasticity - Our Giantarm TPU Flexible Filament is a thermoplastic polyurethane (TPU) based filament specifically engineered to work on most desktop 3D printers Clog-Free, Bubble-Free & Easy-to-use - Designed and Manufactured with Clog-Free patent to guarantee a smoother and more stable printing experience with Giantarm TPU Rolls Full mechanical winding and strict manual examination, to make sure the line tidy and less-tangle, so as to avoid possible snap and line breaking Excellent bed adhesion, low-warp and low-odor, make these flexible 3D filaments easy to print