Zen HT 0.4mmcartuccia Zen ht cartridge in removable steel for the double extruder wasp zen extrol, without teflon for high temperatures prints (suitable for ABS; PC; pc; hips; pa+c; ASA; PMMA and pp). The replacement of the cartridge requires care and competence, follow the video of instructions. exchange, do not stress the extruder with continuous changes of cartridge.