SainSmart Metal-RedCopper-1KG1.75 Red Copper Metal 1.75 mm Filament for 3D Printing, 0.5 kg/1.1 lb. 0.5 kg (approximately 1.10 lbs.) spool 1.75Mm filament diameter (dimensional accuracy +/- 0.05Mm) Recommended extrusion/nozzle temperature 190c - 200c (374f - 392f)