This is a brand new Prusament Galaxy Silver PLA filament spool from Prusa, factory sealed and ready to use. The filament diameter is 1.75mm and the spool contains 1011 grams of material + spool. It is compatible with Prusa and other 3D printers that use 1.75mm PLA filament. The color is a beautiful Galaxy Silver and the material is made of high quality PLA. This filament is perfect for creating high quality 3D prints with a smooth finish.