diff --git a/pygrocy/data_models/product.py b/pygrocy/data_models/product.py
index aaf1e10..62bc500 100644
--- a/pygrocy/data_models/product.py
+++ b/pygrocy/data_models/product.py
@@ -77,7 +77,6 @@ def _init_empty(self):
         self._best_before_date = None
 
         self._default_quantity_unit_purchase = None
-        self._qu_factor_purchase_to_stock = None
 
         self._barcodes = []
         self._product_group_id = None
@@ -115,7 +114,6 @@ def _init_from_ProductData(self, product: ProductData):
         self._id = product.id
         self._product_group_id = product.product_group_id
         self._name = product.name
-        self._qu_factor_purchase_to_stock = product.qu_factor_purchase_to_stock
 
     def _init_from_StockLogResponse(self, response: StockLogResponse):
         self._id = response.product_id
@@ -184,10 +182,6 @@ def is_partly_in_stock(self) -> int:
     def default_quantity_unit_purchase(self) -> QuantityUnit:
         return self._default_quantity_unit_purchase
 
-    @property
-    def qu_factor_purchase_to_stock(self) -> float:
-        return self._qu_factor_purchase_to_stock
-
 
 class Group(DataModel):
     def __init__(self, raw_product_group: LocationData):
diff --git a/pygrocy/data_models/task.py b/pygrocy/data_models/task.py
index 00aa0fe..28ba687 100644
--- a/pygrocy/data_models/task.py
+++ b/pygrocy/data_models/task.py
@@ -32,7 +32,6 @@ def row_created_timestamp(self) -> datetime:
 
 class Task(DataModel):
     def __init__(self, response: TaskResponse):
-
         self._id = response.id
         self._name = response.name
         self._description = response.description
diff --git a/pygrocy/grocy_api_client.py b/pygrocy/grocy_api_client.py
index 510bb30..c8dc1cd 100644
--- a/pygrocy/grocy_api_client.py
+++ b/pygrocy/grocy_api_client.py
@@ -91,7 +91,6 @@ class ProductData(BaseModel):
     product_group_id: Optional[int] = None
     qu_id_stock: int
     qu_id_purchase: int
-    qu_factor_purchase_to_stock: Optional[float] = None
     picture_file_name: Optional[str] = None
     allow_partial_units_in_stock: Optional[bool] = False
     row_created_timestamp: datetime
@@ -100,9 +99,6 @@ class ProductData(BaseModel):
 
     location_id_validator = _field_not_empty_validator("location_id")
     product_group_id_validator = _field_not_empty_validator("product_group_id")
-    qu_factor_purchase_to_stock_validator = _field_not_empty_validator(
-        "qu_factor_purchase_to_stock"
-    )
 
 
 class ChoreData(BaseModel):
diff --git a/test/test_product.py b/test/test_product.py
index 8619b1c..ffffc04 100644
--- a/test/test_product.py
+++ b/test/test_product.py
@@ -23,7 +23,6 @@ def test_product_get_details_valid(self, grocy):
         assert product.name == "Gulash soup"
         assert product.available_amount == 5
         assert product.product_group_id == 3
-        assert product.qu_factor_purchase_to_stock == 1.0
         assert product.default_quantity_unit_purchase.id == 5
         assert product.default_quantity_unit_purchase.name == "Tin"
         assert product.default_quantity_unit_purchase.description is None