Most noteworthy, the InnoCircle line is made from recycled materials. Furthermore this is a sustainable high-performance filament. InnoCircle recycled PET has a brilliant look. Prints smoothly with strong adhesion between layers. Hence rPET is for those involved in 3d printing, who also appreciate the value of recycling. This recycled 3d print filament comes in 1.75 mm and 2.85 mm diameters.