Which of the following is a feature of Priority Mail Express International?

The feature of Priority Mail Express International that stands out is the maximum weight limit. The service allows packages to be sent internationally with a maximum weight of 70 lbs, making it suitable for shipping heavier items abroad. This weight limit is significant because it enables senders to use this service for various types of goods, accommodating those who may need to send larger packages while still benefiting from expedited shipping services internationally.

The other options present features that do not accurately represent Priority Mail Express International. For instance, while this service offers tracking, it is automatically included with the shipment, not just available on request. Additionally, the delivery timeframe for Priority Mail Express International is typically 3-5 business days rather than the quicker 1-3 business days stated. Insurance is also included with this service, which contrasts with the implied notion that no insurance is provided. Thus, the correct answer highlights a vital aspect of the service related to its weight capacity.