Cura/resources/extruders/blv_mgn_cube_extruder_0.def.json

{
  "name": "Extruder 1",
  "version": 2,
  "inherits": "fdmextruder",
  "metadata": {
    "machine": "blv_mgn_cube_base",
    "position": "0"
  },
  "overrides": {
    "extruder_nr": {
      "default_value": 0
    },
    "machine_nozzle_size": {
      "default_value": 0.4
    },
    "material_diameter": {
      "default_value": 1.75
    }
  }
}