This is a 19-inch, slide-out patch panel, chassis with a 4U and 12 open cassette bays, which are customizable and interchangeable. This patch panel provides termination, connection, and management of fiber optic cables. Our smart design provides firm, space-saving protection for all your optic cables. This patch panel's 12 open bays are to be used with our MPO/MTP cassettes and/or blank cover plate, which are sold separately. All of our products are 100% guaranteed to work, providing you a cost effective solution for all of your network upgrade needs.