Cura/resources/extruders/stream30ultrasc2_extruder.def.json

{
    "version": 2,
    "name": "Extruder",
    "inherits": "fdmextruder",
    "metadata": {
        "machine": "stream30ultrasc2",
        "position": "0"
    },

    "overrides": {
        "extruder_nr": {
            "default_value": 0
        },
        "machine_nozzle_size": {
            "default_value": 0.4
        },
        "material_diameter": {
            "default_value": 1.75
        }
    }
}