diff --git a/SlicerConfiguration/SlicerMapping/EngineMappingMatterSlice.cs b/SlicerConfiguration/SlicerMapping/EngineMappingMatterSlice.cs
index 9b1609aa3..831c2fb98 100644
--- a/SlicerConfiguration/SlicerMapping/EngineMappingMatterSlice.cs
+++ b/SlicerConfiguration/SlicerMapping/EngineMappingMatterSlice.cs
@@ -201,6 +201,9 @@ namespace MatterHackers.MatterControl.SlicerConfiguration
             //outsidePerimeterSpeed=50 # The speed of the first perimeter. mm/s.
             new AsPercentOfReferenceOrDirect("outsidePerimeterSpeed", "external_perimeter_speed", "perimeter_speed"),
 
+			//outsidePerimeterExtrusionWidth=extrusionWidth=nozzleDiameter
+			new AsPercentOfReferenceOrDirect("outsidePerimeterExtrusionWidth", "external_perimeter_extrusion_width", "nozzle_diameter"),
+
             //numberOfPerimeters=2
             new AsCountOrDistance("numberOfPerimeters", "perimeters", "nozzle_diameter"),
 
diff --git a/StaticData/PrinterSettings/config.ini b/StaticData/PrinterSettings/config.ini
index 21cdd9121..5ad23aa24 100644
--- a/StaticData/PrinterSettings/config.ini
+++ b/StaticData/PrinterSettings/config.ini
@@ -87,6 +87,7 @@ pause_gcode =
 perimeter_acceleration = 0
 perimeter_extruder = 1
 perimeter_extrusion_width = 0
+external_perimeter_extrusion_width = 100%
 perimeter_speed = 30
 perimeters = 3
 post_process = 
diff --git a/StaticData/SliceSettings/Layouts.txt b/StaticData/SliceSettings/Layouts.txt
index 8d2163459..07fb5a20a 100644
--- a/StaticData/SliceSettings/Layouts.txt
+++ b/StaticData/SliceSettings/Layouts.txt
@@ -219,6 +219,7 @@ Advanced
         extrusion_width
         first_layer_extrusion_width
         perimeter_extrusion_width
+        external_perimeter_extrusion_width
         infill_extrusion_width
         solid_infill_extrusion_width
         top_infill_extrusion_width
diff --git a/StaticData/SliceSettings/Properties.json b/StaticData/SliceSettings/Properties.json
index b549b2b5d..540c06d1d 100644
--- a/StaticData/SliceSettings/Properties.json
+++ b/StaticData/SliceSettings/Properties.json
@@ -654,6 +654,13 @@
     "DataEditType": "DOUBLE_OR_PERCENT",
     "ExtraSettings": "mm or %\\nleave 0 for default"
   },
+  {
+    "SlicerConfigName": "external_perimeter_extrusion_width",
+    "PresentationName": "Outside Perimeters",
+    "HelpText": "Leave this as 0 to allow automatic calculation of extrusion width.",
+    "DataEditType": "DOUBLE_OR_PERCENT",
+    "ExtraSettings": "mm or %\\nleave 0 for default"
+  },
   {
     "SlicerConfigName": "perimeter_speed",
     "PresentationName": "Inside Perimeters",
diff --git a/StaticData/Translations/Master.txt b/StaticData/Translations/Master.txt
index 9aca243a8..447800c06 100644
--- a/StaticData/Translations/Master.txt
+++ b/StaticData/Translations/Master.txt
@@ -3820,3 +3820,6 @@ Translated:Oops! Please sign in to enable this feature.
 English:Rebuild
 Translated:Rebuild
 
+English:Outside Perimeters
+Translated:Outside Perimeters
+
diff --git a/Submodules/MatterSlice b/Submodules/MatterSlice
index 19f31062d..efb0abb42 160000
--- a/Submodules/MatterSlice
+++ b/Submodules/MatterSlice
@@ -1 +1 @@
-Subproject commit 19f31062d6e9a40a6f94e0de45f4dc6b9b9522fc
+Subproject commit efb0abb424dc438ab0d759eee877ff8d4a7e7670