# UltracartClient::ItemFulfillmentAddon ## Properties Name | Type | Description | Notes ------------ | ------------- | ------------- | ------------- **add_item_id** | **String** | Add Item Id | [optional] **add_item_oid** | **Integer** | Add Item object identifier | [optional] **initial_order_only** | **BOOLEAN** | Initial Order Only | [optional] **once_per_order** | **BOOLEAN** | Once Per Order | [optional] **quantity** | **Integer** | Quantity | [optional]