OptionalasinAmazon Standard Identification Number of the substitute product.
OptionalmeasurementOptionalquantityNumber of units of the substitute item to be selected if substitution occurs.
OptionalsellerThe item's seller stock keeping unit (SKU).
OptionaltitleProduct name or title of the substitute item as displayed to customers.
Alternative product that can be substituted for an original order item when it becomes unavailable during fulfillment.