diff --git a/bec_widgets/widgets/control/device_manager/components/constants.py b/bec_widgets/widgets/control/device_manager/components/constants.py
new file mode 100644
index 00000000..a75950ab
--- /dev/null
+++ b/bec_widgets/widgets/control/device_manager/components/constants.py
@@ -0,0 +1,5 @@
+from typing import Final
+
+# Denotes a MIME type for JSON-encoded list of device config dictionaries
+MIME_DEVICE_CONFIG: Final[str] = "application/x-bec_device_config"
+CONFIG_DATA_ROLE: Final[int] = 118