Cura/resources/extruders/arjunpro_dm_extruder.def.json

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

    "overrides": {
        "extruder_nr": {
            "default_value": 0,
            "maximum_value": "1"
        },
        "machine_nozzle_size": { "default_value": 0.4 },
        "material_diameter": { "default_value": 1.75 },
        "machine_nozzle_offset_x": { "default_value": 0 },
        "machine_nozzle_offset_y": { "default_value": 0 }
    }
}