Strict Quality Control - Ziro 3D's manufacturing tolerance is +/- 0.03mm. Spools are neatly wound & 100% tangle-free. Vacuum Sealed Packaging - Filament is kept dry with air-tight packaging so that each roll of filament arrives in the user's hands in perfect condition. Smooth Printing - Ziro 3D PLA PRO series filament prints smoothly, with high purity, low shrinkage and excellent layer adhesion for your printing project needs. Rich Colors - Don't let a lack of color limit your printing! Ziro 3D offers a broad range of basic colors in their PLA PRO series, with high purity & saturation. Biodegradable Material - Ziro 3D PLA PRO filament is made of premium PLA material (polylactic acid), which boasts complete biodgradation and lower melting temperature, does not require a heated bed, and produces no odor during printing