Extruder Ingenuity. 3D Platform’s HFA and HFE extruders are the fastest filament extruders on the market. Quick-Swap dual extruder heads deliver high quality 3D prints and are independently controlled for speed and extruded material amounts. The modular design can accommodate filament sizes from 1.75mm to 6mm and nozzles sizes from 0.2mm to 5mm. Genius!