diff --git a/app/Models/Item.php b/app/Models/Item.php
index 821795d..97152b5 100644
--- a/app/Models/Item.php
+++ b/app/Models/Item.php
@@ -55,4 +55,9 @@ class Item extends Model
     {
         return $this->hasMany(ItemCharacteristic::class, 'item_id', 'id');
     }
+
+    public function productCharacteristicsMasters()
+    {
+        return $this->hasMany(ProductCharacteristicsMaster::class);
+    }
 }