This PLA SILK 3D printing filament dimensional accuracy 1.75 mm +/- 0.05 mm, raw material derives from corn starch, with high purity USA PLA original material, no bubbles, no clogging, no odor, good quality. Very neatly wound so no kinks or jams, good adhesion and superb layer bonding ensure excellent print quality and stability, makes it prints clean and have no extrusion issues