diff --git a/app/Models/Item.php b/app/Models/Item.php
index 9e62266..0c2d12e 100644
--- a/app/Models/Item.php
+++ b/app/Models/Item.php
@@ -48,4 +48,9 @@ class Item extends Model
     {
         return $this->hasMany(ProcessOrder::class);
     }
+
+    public function productCharacteristicsMasters()
+    {
+        return $this->hasMany(ProductCharacteristicsMaster::class);
+    }
 }