The purefil refill packs are wound filaments that are supplied without a spool. With this product, the purefil plastic spools can be refilled with new filament. This means that the empty spool no longer has to be disposed of and resources are saved. The use of high-quality raw materials creates a 3D printer filament that is particularly easy to process. Using a state-of-the-art manufacturing process, very low manufacturing tolerances are achieved, which leads to convincing print results with all FDM 3D printers. Each refill pack is sealed in a high-quality bag.-Made in Switzerland- low diameter and roundness tolerances- easy to print Purefil PLA Silk is a PLA-based filament to which appropriate additives are added to achieve a metallic sheen. The printed parts have exceptional aesthetic properties. PLA Silk is as easy to process as standard PLA and has slightly better mechanical properties. This unique filament is particularly suitable for applications with high demands on the appearance of the printed parts. Due to the additives included, PLA Silk is no longer 100% biodegradable and cannot be composted. This filament meets the compositional requirements of European Regulation No. 10/2011 on plastic materials intended for food contact. Characteristics: - fantastically beautiful optics - slightly better mechanical properties than standard PLA - beautiful shine effect - easily printable - does not fade.