What type of items can be classified as machinable by postal standards?

Items that can be classified as machinable by postal standards are those with uniform thickness. This is critical because uniformity allows the automated machinery used in postal processing to handle the items efficiently and effectively. When an item has a consistent thickness, it can be accurately measured and processed without risking jams or misalignment in the sorting machines.

The classification of machinable items is essential for ensuring that the postal system can process mail quickly and reliably. When items meet these specific requirements, they can flow smoothly through the various stages of sorting and delivery, minimizing delays and operational issues.

In contrast, items weighing less than 10 ounces may vary in characteristics that do not guarantee they are machinable. Similarly, items larger than 15" in length often do not fit within the standards for machinability, which generally favor smaller and uniformly shaped items. Items containing mechanical parts can create issues in handling and processing, making them more challenging for the automated systems to manage effectively. Thus, uniform thickness is the key factor that defines machinability within postal standards.