# Parcel line items

Parcel line items track the SKUs in the related [parcel](/core-api-reference/parcels.md).

* If a stock line item in a shipment is not split, the parcel line items correspond to the stock line item's SKUs.
* If a stock line item is split, the line items are split into more than one parcel line item. A single stock line item can also be split into more than one parcel line item.

<details>

<summary>Data model</summary>

Check the related [ER diagram](/data-model/shipping/parcels-packages-and-pickups.md) and explore the flowchart that illustrates how the parcel line item resource relates to the other API entities.

</details>


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