{"section":"tutorials","requestedLocale":"en","requestedSlug":"what-is-an-attachment","locale":"en","slug":"what-is-an-attachment","path":"docs/en/tutorials/catalog/custom-product-attributes/what-is-an-attachment.md","branch":"main","content":"An attachment is the optional and cost-free customization of a product. It's used to add information to an SKU. This information may be related to a [service](/en/docs/tutorials/what-is-a-service) or the purchased item itself.\n\n> ⚠️ VTEX does not control the stock of an attachment. This is a responsibility of the marketplace or the seller.\n\nIf your purchased item is a Brazilian National Team Shirt, the name of your Attachment may be __Customization__, and its keys:\n\n- Name: which allows the inclusion of the customer's name, with up to 20 characters, on the back of the shirt.\n- Number: which allows the inclusion of a number chosen by the client in the back of the shirt, among the values 5, 7, 9, 10 and 11.\n\n### Related articles\n- [Adding an attachment](/en/docs/tutorials/adding-an-attachment)\n- [What is a service?](/en/docs/tutorials/what-is-a-service)\n- [How to create a service for an SKU](/en/tutorial/creating-a-service-for-a-sku)"}