diff --git a/tienda_ilusion/don_confiao/migrations/0042_product_unit_external_id.py b/tienda_ilusion/don_confiao/migrations/0042_product_unit_external_id.py
new file mode 100644
index 0000000..768d0ad
--- /dev/null
+++ b/tienda_ilusion/don_confiao/migrations/0042_product_unit_external_id.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.0.6 on 2025-07-19 23:15
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('don_confiao', '0041_product_external_id'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='product',
+            name='unit_external_id',
+            field=models.CharField(blank=True, max_length=100, null=True),
+        ),
+    ]
diff --git a/tienda_ilusion/don_confiao/models.py b/tienda_ilusion/don_confiao/models.py
index 22dbcef..8fb52c0 100644
--- a/tienda_ilusion/don_confiao/models.py
+++ b/tienda_ilusion/don_confiao/models.py
@@ -42,6 +42,7 @@ class Product(models.Model):
         choices=MeasuringUnits.choices,
         default=MeasuringUnits.UNIT
     )
+    unit_external_id = models.CharField(max_length=100, null=True, blank=True)
     categories = models.ManyToManyField(ProductCategory)
     external_id = models.CharField(max_length=100, null=True, blank=True)
 
diff --git a/tienda_ilusion/don_confiao/tests/test_products.py b/tienda_ilusion/don_confiao/tests/test_products.py
index 6104a74..1330fd0 100644
--- a/tienda_ilusion/don_confiao/tests/test_products.py
+++ b/tienda_ilusion/don_confiao/tests/test_products.py
@@ -18,6 +18,7 @@ class TestProducts(TestCase):
 
         self.assertIsInstance(product, Product)
         self.assertIsNone(product.external_id)
+        self.assertIsNone(product.unit_external_id)
 
     def test_import_products(self):
         self._import_csv()