diff --git a/PCK-Studio/Internal/Skin/SkinIdentifier.cs b/PCK-Studio/Internal/Skin/SkinIdentifier.cs
new file mode 100644
index 00000000..ebe67811
--- /dev/null
+++ b/PCK-Studio/Internal/Skin/SkinIdentifier.cs
@@ -0,0 +1,23 @@
+using System;
+using System.Globalization;
+
+namespace PckStudio.Internal.Skin
+{
+    public sealed class SkinIdentifier : IFormattable
+    {
+        public int Id { get; }
+
+        public SkinIdentifier(int id)
+        {
+            Id = id;
+        }
+
+        public static implicit operator int(SkinIdentifier _this) => _this.Id;
+
+        public string ToString(string format, IFormatProvider formatProvider) => Id.ToString(format, formatProvider);
+
+        public string ToString(string format) => Id.ToString(format, NumberFormatInfo.CurrentInfo);
+
+        public override string ToString() => Id.ToString(NumberFormatInfo.CurrentInfo);
+    }
+}
diff --git a/PCK-Studio/Internal/Skin/SkinModel.cs b/PCK-Studio/Internal/Skin/SkinModel.cs
new file mode 100644
index 00000000..ee4ee6d5
--- /dev/null
+++ b/PCK-Studio/Internal/Skin/SkinModel.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using OMI.Formats.Pck;
+
+namespace PckStudio.Internal.Skin
+{
+    public sealed class SkinModel
+    {
+        public readonly List<SkinBOX> AdditionalBoxes;
+        public readonly List<SkinPartOffset> PartOffsets;
+
+        public SkinModel()
+        {
+            AdditionalBoxes = new List<SkinBOX>();
+            PartOffsets = new List<SkinPartOffset>(5);
+        }
+
+        public SkinModel(IEnumerable<SkinBOX> additionalBoxes, IEnumerable<SkinPartOffset> partOffsets)
+        {
+            AdditionalBoxes = new List<SkinBOX>(additionalBoxes);
+            PartOffsets = new List<SkinPartOffset>(partOffsets);
+        }
+    }
+}
diff --git a/PCK-Studio/PckStudio.csproj b/PCK-Studio/PckStudio.csproj
index 34e18dc8..0aa6d7b7 100644
--- a/PCK-Studio/PckStudio.csproj
+++ b/PCK-Studio/PckStudio.csproj
@@ -198,7 +198,9 @@
     <Compile Include="Internal\App\CommitInfo.cs" />
     <Compile Include="External\Format\BlockBenchModel.cs" />
     <Compile Include="Internal\Skin\Skin.cs" />
+    <Compile Include="Internal\Skin\SkinIdentifier.cs" />
     <Compile Include="Internal\Skin\SkinMetaData.cs" />
+    <Compile Include="Internal\Skin\SkinModel.cs" />
     <Compile Include="Internal\Skin\SkinModelInfo.cs" />
     <Compile Include="Internal\Skin\SkinPartOffset.cs" />
     <Compile Include="Internal\ResourceLocation.cs" />