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. Fully welded construction for strength Racks gang together when fully loaded Multiple lacing points and slotted rail brackets for cable management flexibility Includes two pair cage nut style rackrail.