diff --git a/src/wireviz/Harness.py b/src/wireviz/Harness.py
index 4df9c7a..117e0d9 100644
--- a/src/wireviz/Harness.py
+++ b/src/wireviz/Harness.py
@@ -12,7 +12,7 @@ from wireviz import wv_colors, __version__, APP_NAME, APP_URL
 from wireviz.DataClasses import Connector, Cable
 from wireviz.wv_colors import get_color_hex
 from wireviz.wv_gv_html import nested_html_table, html_colorbar, html_image, \
-    html_caption, remove_links, html_line_breaks
+    html_caption, remove_links, html_line_breaks, bom_bubble
 from wireviz.wv_bom import manufacturer_info_field, component_table_entry, \
     get_additional_component_table, bom_list, generate_bom
 from wireviz.wv_html import generate_html_output
@@ -115,7 +115,7 @@ class Harness:
             html = []
 
             rows = [[remove_links(connector.name) if connector.show_name else None],
-                    ['<BOM Number>' if self.show_bom_item_numbers else None,  # TODO: Show actual BOM number
+                    [bom_bubble('###') if self.show_bom_item_numbers else None,  # TODO: Show actual BOM number
                      html_line_breaks(connector.type),
                      html_line_breaks(connector.subtype),
                      f'{connector.pincount}-pin' if connector.show_pincount else None,
diff --git a/src/wireviz/wv_bom.py b/src/wireviz/wv_bom.py
index 85ff0f8..461a82e 100644
--- a/src/wireviz/wv_bom.py
+++ b/src/wireviz/wv_bom.py
@@ -6,7 +6,7 @@ from itertools import groupby
 from typing import Any, Dict, List, Optional, Tuple, Union
 
 from wireviz.DataClasses import AdditionalComponent, Connector, Cable
-from wireviz.wv_gv_html import html_line_breaks
+from wireviz.wv_gv_html import html_line_breaks, bom_bubble
 from wireviz.wv_helper import clean_whitespace
 
 BOMColumn = str  # = Literal['id', 'description', 'qty', 'unit', 'designators', 'pn', 'manufacturer', 'mpn']
@@ -35,7 +35,7 @@ def get_additional_component_table(harness: "Harness", component: Union[Connecto
             manufacturer_str = manufacturer_info_field(part.manufacturer, part.mpn)
             columns = []
             if harness.show_bom_item_numbers:
-                columns.append(f'<table border="0"><tr><td border="1" style="rounded">{id}</td></tr></table>')
+                columns.append(bom_bubble(id))
             columns.append(f'{part.qty}' + (f' {part.unit}' if part.unit else ' x'))
             columns.append(f'{part.type}')
             if harness.show_part_numbers:
diff --git a/src/wireviz/wv_gv_html.py b/src/wireviz/wv_gv_html.py
index ee5b2e2..87b2496 100644
--- a/src/wireviz/wv_gv_html.py
+++ b/src/wireviz/wv_gv_html.py
@@ -64,3 +64,6 @@ def html_size_attr(image):
 
 def html_line_breaks(inp):
     return remove_links(inp).replace('\n', '<br />') if isinstance(inp, str) else inp
+
+def bom_bubble(inp):
+    return(f'<table border="0"><tr><td border="1" style="rounded">{inp}</td></tr></table>')