This is a 5.25" bay cover / front plate for a Chieftec UNC-310RS-B-OP 3U server chassis as the old origina ones were not only challenged design wise but also in the quatintity of airflow they let trough, so I designed a new one to replace them. You can see more about them at: https://youtu.be/R75euW6XNEQ I have included both the object files and the design files so that more verisions can be made.