diff --git a/Models/Item.php b/Models/Item.php
index 39aeda1..771acc5 100644
--- a/Models/Item.php
+++ b/Models/Item.php
@@ -28,7 +28,7 @@ class Item
 {
     private $id = 0;
 
-    private $number = 0;
+    private $number = '';
 
     private $articleGroup = 0;
 
@@ -71,12 +71,12 @@ class Item
         return $this->createdAt;
     }
 
-    public function getNumber() : int
+    public function getNumber() : string
     {
         return $this->number;
     }
 
-    public function setNumber(int $number) : void
+    public function setNumber(string $number) : void
     {
         $this->number = $number;
     }
diff --git a/Models/ItemLocalization.php b/Models/ItemLocalization.php
deleted file mode 100644
index e69de29..0000000
diff --git a/Models/ItemLocalizationMapper.php b/Models/ItemLocalizationMapper.php
deleted file mode 100644
index e69de29..0000000
diff --git a/Models/ItemMapper.php b/Models/ItemMapper.php
index 3f6df93..b51ed2f 100644
--- a/Models/ItemMapper.php
+++ b/Models/ItemMapper.php
@@ -27,7 +27,7 @@ final class ItemMapper extends DataMapperAbstract
      */
     protected static $columns = [
         'itemmgmt_item_id'           => ['name' => 'itemmgmt_item_id', 'type' => 'int', 'internal' => 'id'],
-        'itemmgmt_item_no'           => ['name' => 'itemmgmt_item_no', 'type' => 'int', 'internal' => 'number'],
+        'itemmgmt_item_no'           => ['name' => 'itemmgmt_item_no', 'type' => 'string', 'internal' => 'number'],
         'itemmgmt_item_segment'      => ['name' => 'itemmgmt_item_segment', 'type' => 'int', 'internal' => 'segment'],
         'itemmgmt_item_info'         => ['name' => 'itemmgmt_item_info', 'type' => 'string', 'internal' => 'info'],
     ];