To install a specific version, use the nrfutil sdk-manager install command and specify the version you want to install.
For example, the following command installs both the SDK bundles and its corresponding toolchain bundle for the nRF Connect SDK v2.7.0:
nrfutil sdk-manager install v2.7.0
The installation can take several minutes.
If the SDK bundle is not yet installed, this command installs it. The command always installs the newest toolchain release for the given SDK version, including patched releases, even if an older toolchain for that SDK version is already installed.
You can use the --region flag to install SDKs and toolchains from region-specific indexes. For more information, see Installing region-specific SDKs and toolchains.
For more information about the install command, see sdk-manager install | uninstall.