It is Strong™ Rack 4 Space Decora Panel with 1U. Decora panel provides space for mount component video outlets, HDMI jacks, audio keypads, Cat5 keystones, or even volume controls. Install it to the front or rear of the rack to pre-build and pre-wire the entire rack, transport it and then simply plug-n-play when getting to the job site! Oh, and they partner wonderfully with all of our Decora straps and volume controls.