diff --git a/resources/profiles/Prusa/machine/Prusa MK4 0.25 nozzle.json b/resources/profiles/Prusa/machine/Prusa MK4 0.25 nozzle.json
index 667eaa71441..dfeb0d299c3 100644
--- a/resources/profiles/Prusa/machine/Prusa MK4 0.25 nozzle.json	
+++ b/resources/profiles/Prusa/machine/Prusa MK4 0.25 nozzle.json	
@@ -10,10 +10,11 @@
   "default_filament_profile": [
       "Prusa Generic PLA @MK4"
   ],
-  "default_print_profile": "0.20mm Standard @MK4",
+  "default_print_profile": "0.08mm Standard @MK4",
   "nozzle_diameter": [
       "0.25"
   ],
+  "printer_variant": "0.25",
   "bed_exclude_area": [
     "0x0"
   ],
diff --git a/resources/profiles/Prusa/machine/Prusa MK4 0.6 nozzle.json b/resources/profiles/Prusa/machine/Prusa MK4 0.6 nozzle.json
index 53eb7e53773..8846cb56651 100644
--- a/resources/profiles/Prusa/machine/Prusa MK4 0.6 nozzle.json	
+++ b/resources/profiles/Prusa/machine/Prusa MK4 0.6 nozzle.json	
@@ -10,10 +10,11 @@
   "default_filament_profile": [
       "Prusa Generic PLA @MK4"
   ],
-  "default_print_profile": "0.20mm Standard @MK4",
+  "default_print_profile": "0.32mm Standard @MK4",
   "nozzle_diameter": [
       "0.6"
   ],
+  "printer_variant": "0.6",
   "bed_exclude_area": [
     "0x0"
   ],
diff --git a/resources/profiles/Prusa/machine/Prusa MK4 0.8 nozzle.json b/resources/profiles/Prusa/machine/Prusa MK4 0.8 nozzle.json
index 5ed825f0fe3..06008c154a9 100644
--- a/resources/profiles/Prusa/machine/Prusa MK4 0.8 nozzle.json	
+++ b/resources/profiles/Prusa/machine/Prusa MK4 0.8 nozzle.json	
@@ -10,10 +10,11 @@
   "default_filament_profile": [
       "Prusa Generic PLA @MK4"
   ],
-  "default_print_profile": "0.20mm Standard @MK4",
+  "default_print_profile": "0.40mm Standard @MK4",
   "nozzle_diameter": [
       "0.8"
   ],
+  "printer_variant": "0.8",
   "bed_exclude_area": [
     "0x0"
   ],
diff --git a/resources/profiles/Prusa/machine/Prusa MK4.json b/resources/profiles/Prusa/machine/Prusa MK4.json
index 7b5a02b9e8f..9291c7be0d4 100644
--- a/resources/profiles/Prusa/machine/Prusa MK4.json	
+++ b/resources/profiles/Prusa/machine/Prusa MK4.json	
@@ -8,5 +8,5 @@
     "bed_model": "mk4_bed.stl",
     "bed_texture": "mk4is.svg",
     "hotend_model": "",
-    "default_materials": "Prusa Generic PLA-CF;Prusa Generic PC;Prusa Generic PVA;Prusa Generic PA;Prusa Generic PA-CF;Prusa Generic ABS @MK4;Prusa Generic PLA @MK4;Prusa Generic PETG @MK4;Prusa Generic TPU @MK4;Prusa Generic ASA @MK4"
+    "default_materials": "Prusa Generic PLA-CF;Prusa Generic PC;Prusa Generic PVA;Prusa Generic PA;Prusa Generic PA-CF;Prusa Generic ABS @MK4;Prusa Generic PLA @MK4;Prusa Generic PETG @MK4;Prusa Generic TPU @MK4;Prusa Generic ASA @MK4;"
 }