Specify MRK series when you need an enclosure built to perform like a workhorse. Its rugged, space-saving design and high seismic load rating make it a favorite of installing contractors, particularly on larger-scale multi-bay jobs. The MRK series also offers seismic certification and open or removable sides.</p><p><strong>Racks with "PRO" suffix include two pair cage nut style rackrail.</strong></p>