Index: src/Deltares.DSoilModel.Forms/DSoilModelContext.cs
===================================================================
diff -u -r741 -r743
--- src/Deltares.DSoilModel.Forms/DSoilModelContext.cs	(.../DSoilModelContext.cs)	(revision 741)
+++ src/Deltares.DSoilModel.Forms/DSoilModelContext.cs	(.../DSoilModelContext.cs)	(revision 743)
@@ -485,6 +485,13 @@
         /// <returns></returns>
         public override string GetFormat(Type type, object source, string member)
         {
+            if (type == typeof(Soil) || source is Soil)
+            {
+                if (member == StaticReflection.GetMemberName<Soil>(x => x.PermeabKx))
+                {
+                    return "F10";
+                }
+            }
             if (type == typeof(ConePenetrationTestPerSegment) || source is ConePenetrationTestPerSegment)
             {
                 if (member == StaticReflection.GetMemberName<ConePenetrationTestPerSegment>(x => x.Xlocal))