Consumable products or consumables are goods used by individuals and businesses that must be replaced regularly because they wear out or are used up.
You can think of timing belts, relay boxes or sensors.
When you purchase a consumable product the purchase will be final. Breaking the seal of the packaging means you accept the product is opened and cannot be returned under the rights you’d have in the cool down period.
However, if you realise you don’t want to use the product and you left it unopened in it’s original packaging you are allowed to return the product.
In short: Opening the packaging means you agree to keep the product.
Normal warranty terms apply of course.