diff --git a/resources/extruders/blocks_one_extruder_0.def.json b/resources/extruders/blocks_one_extruder_0.def.json
new file mode 100644
index 0000000000..c26b6ade85
--- /dev/null
+++ b/resources/extruders/blocks_one_extruder_0.def.json
@@ -0,0 +1,15 @@
+{
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "blocks_one",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
\ No newline at end of file
diff --git a/resources/extruders/blocks_oneauto_extruder_0.def.json b/resources/extruders/blocks_oneauto_extruder_0.def.json
new file mode 100644
index 0000000000..1f28ca5dcf
--- /dev/null
+++ b/resources/extruders/blocks_oneauto_extruder_0.def.json
@@ -0,0 +1,15 @@
+{
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "blocks_oneauto",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
\ No newline at end of file
diff --git a/resources/extruders/blocks_rd50_extruder_0.def.json b/resources/extruders/blocks_rd50_extruder_0.def.json
new file mode 100644
index 0000000000..6296c0146d
--- /dev/null
+++ b/resources/extruders/blocks_rd50_extruder_0.def.json
@@ -0,0 +1,15 @@
+{
+    "version": 2,
+    "name": "Extruder 1",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "blocks_rd50",
+        "position": "0"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
\ No newline at end of file
diff --git a/resources/extruders/blocks_rd50_extruder_1.def.json b/resources/extruders/blocks_rd50_extruder_1.def.json
new file mode 100644
index 0000000000..6a266d87d6
--- /dev/null
+++ b/resources/extruders/blocks_rd50_extruder_1.def.json
@@ -0,0 +1,15 @@
+{
+    "version": 2,
+    "name": "Extruder 2",
+    "inherits": "fdmextruder",
+    "metadata": {
+        "machine": "blocks_rd50",
+        "position": "1"
+    },
+
+    "overrides": {
+        "extruder_nr": { "default_value": 0 },
+        "machine_nozzle_size": { "default_value": 0.4 },
+        "material_diameter": { "default_value": 1.75 }
+    }
+}
\ No newline at end of file