MakerBot PC-ABS FR Filament Spool for Method X 3D Printer (Black, 0.71kg/1.56lb)The MakerBot PC ABS FR Filament helps print durable and heat resistant prototypes and end use parts. PC ABS is a strong, engineering grade material that has both high heat resistance and high impact resistance. When ABS does not provide a high enough impact resistance, but high heat resistance is still required, PC ABS is a great alternative, due to the addition of polycarbonate. PC ABS FR is a flame retardant version of PC ABS. Flame retardance is a