Proto-pasta Polycarbonate-ABS Alloy, 1.75 mm, 500g, Black Polycarbonate-abs alloy is a strong, resilient material that is easier to print than just polycarbonate but with the added benefits High performance material for high performance hardware! heated bed and high temperature all metal hot end required Processing is more challenging, good results are achieved when printing small parts at 270-280c on a heated bed. For larger prints with good layer adhesion and minimal warp an enclosure is ideal Printed parts are tough, lightweight, and have excellent impact resistance. Use with good ventilation Designed and manufactured in the USA with quality and customer service as a top priorities. Usa sourced packaging and labor