Dimensional tolerance 0.02 mm: 3D printer filaments are manufactured with more precise specifications, with a tolerance of only +/- 0.02 mm. Perfect roundness and very tight diameter tolerance, approx. 330 m filament per spool, easy to handle, minimal warping, no odor, no clogging, no bubbles. Give you a wonderful printing experience.100% Eco-friendly: Made from starch raw materials from renewable plant resources, biodegradable and environmentally friendly, non-toxic and low odor. Ultimately produces carbon dioxide and water without harming the environment. Complies with the RoHS (Restriction of Hazardous Substances) directive and does not contain potentially harmful substances.Compatible with most FDM 3D printers and 3D pens: Thanks to the high quality standards in manufacturing accuracy and a low diameter tolerance of +/- 0.02 mm, it works perfectly with all popular 1.75 mm FDM 3D printers.Vacuum Sealed Package: This allows you to easily keep your 3D printer filaments in the best storage condition, free of dust or dirt before opening the vacuum sealed package, preventing nozzle clogging and getting smooth 3D models.