METAL COPPER is our 80% copper filled filament which is easy to print, sand & polish. With MT-COPPER you can create the most beautiful objects with real METAL characteristics, such as a 3 x higher weight then PLA, a METAL feel & touch and thermal conductivity. Due to the high percentage of fillers MT-COPPER has virtually no shrinkage. A special lubricant increases the flow and prevents MT-COPPER to adhere to the nozzle. F,inally all above combined with the correct hardness results in a filament that can be printed on almost every type of FDM 3D printer available on the market with retraction enabled on nozzles ≥ 0.35 mm.