[Home](./index.md) > [@firebase/storage](./storage.md) > [SettableMetadata](./storage.settablemetadata.md) ## SettableMetadata interface Object metadata that can be set at any time. Signature: ```typescript export interface SettableMetadata ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [cacheControl?](./storage.settablemetadata.cachecontrol.md) | string \| undefined | (Optional) Served as the 'Cache-Control' header on object download. | | [contentDisposition?](./storage.settablemetadata.contentdisposition.md) | string \| undefined | (Optional) Served as the 'Content-Disposition' header on object download. | | [contentEncoding?](./storage.settablemetadata.contentencoding.md) | string \| undefined | (Optional) Served as the 'Content-Encoding' header on object download. | | [contentLanguage?](./storage.settablemetadata.contentlanguage.md) | string \| undefined | (Optional) Served as the 'Content-Language' header on object download. | | [contentType?](./storage.settablemetadata.contenttype.md) | string \| undefined | (Optional) Served as the 'Content-Type' header on object download. | | [customMetadata?](./storage.settablemetadata.custommetadata.md) | { \[key: string\]: string; } \| undefined | (Optional) Additional user-defined custom metadata. |