Fantastic Flexible Filaments (Which Aren’t TPU) spots some cool alternatives to standard TPU—think bouncy PEBA-95A, airy Foam TPU Air, stiff glass-fiber-reinforced PBT Pro, chemical-resistant polypropylene (PP), high-duro 72D TPU and the funky Timemass Active blend—plus a free 3D printing eBook to level up your prints.
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