There are three product types that you can choose from when setting up a product:
Storable: A storable product is a product for which you need the stock to be managed
Consumable: A consumable product is a product for which you do not need the stock to be managed.
Service: A non-material product for which stock management is not possible.
Changing the product type from storable to consumable or service is not permitted if stock movements have taken place.
Advice and answers regarding Inventory