diff --git a/tutorial/readme.md b/tutorial/readme.md
index dc7bbcb..1ed541d 100644
--- a/tutorial/readme.md
+++ b/tutorial/readme.md
@@ -361,3 +361,61 @@ Output:
 [Bill of Materials](tutorial07.bom.tsv)
 
 
+## 8 - Part numbers
+
+* Part number information can be added to parts
+  * Only provided fields will be added to the diagram and bom
+* Bundles can have part information specified by wire
+
+[Source](tutorial08.yml):
+
+```yaml
+connectors:
+  X1: &template1 # define a template for later use
+    type: Molex KK 254
+    pincount: 4
+    subtype: female
+    manufacturer: Molex
+    manufacturer_part_number: 22013047
+  X2:
+    <<: *template1 # reuse template
+    internal_part_number: CON4
+  X3:
+    <<: *template1 # reuse template
+
+cables:
+  W1:
+    wirecount: 4
+    length: 1
+    gauge: 0.25 mm2
+    color_code: IEC
+    manufacturer: CablesCo
+    manufacturer_part_number: ABC123
+    internal_part_number: CAB1
+  W2:
+    category: bundle
+    length: 1
+    gauge: 0.25 mm2
+    colors: [YE, BK, BK, RD]
+    manufacturer: [WiresCo,WiresCo,WiresCo,WiresCo]
+    manufacturer_part_number: [W1-YE,W1-BK,W1-BK,W1-RD]
+    internal_part_number: [WIRE1,WIRE2,WIRE2,WIRE3]
+
+
+connections:
+  -
+    - X1: [1-4]
+    - W1: [1-4]
+    - X2: [1-4]
+  -
+    - X1: [1-4]
+    - W2: [1-4]
+    - X3: [1-4]
+```
+
+
+Output:
+
+![](tutorial08.png)
+
+[Bill of Materials](tutorial08.bom.tsv)
diff --git a/tutorial/tutorial08.yml b/tutorial/tutorial08.yml
new file mode 100644
index 0000000..56a3800
--- /dev/null
+++ b/tutorial/tutorial08.yml
@@ -0,0 +1,41 @@
+connectors:
+  X1: &template1 # define a template for later use
+    type: Molex KK 254
+    pincount: 4
+    subtype: female
+    manufacturer: Molex
+    manufacturer_part_number: 22013047
+  X2:
+    <<: *template1 # reuse template
+    internal_part_number: CON4
+  X3:
+    <<: *template1 # reuse template
+
+cables:
+  W1:
+    wirecount: 4
+    length: 1
+    gauge: 0.25 mm2
+    color_code: IEC
+    manufacturer: CablesCo
+    manufacturer_part_number: ABC123
+    internal_part_number: CAB1
+  W2:
+    category: bundle
+    length: 1
+    gauge: 0.25 mm2
+    colors: [YE, BK, BK, RD]
+    manufacturer: [WiresCo,WiresCo,WiresCo,WiresCo]
+    manufacturer_part_number: [W1-YE,W1-BK,W1-BK,W1-RD]
+    internal_part_number: [WIRE1,WIRE2,WIRE2,WIRE3]
+
+
+connections:
+  -
+    - X1: [1-4]
+    - W1: [1-4]
+    - X2: [1-4]
+  -
+    - X1: [1-4]
+    - W2: [1-4]
+    - X3: [1-4]