Proto-pasta CDP11701 Electrically Conductive Carbon Loose Coil, PLA Composite 1.75 mm, 125g, Black High electrical conductivity of 15ohm-cm suitable for lighting led's, touch sensors and other electronics. Please Note that this is a loose coil and NOT on a spool Dark Black in color with good printing on PLA machines Processing is comparable to standard PLA. No heated bed required, but it may improve results. Process may be less consistent on smaller nozzles (&lt;.4mm) and/or bowden Type machines We recommend printing this material at 220c-230c using a 4 mm or larger nozzle. Please Note that this filament is more brittle than normal PLA and requires more careful handling to prevent breaking Designed and manufactured in the USA with quality and customer service as a top priorities. Usa sourced packaging and labor