Introducing the MRK Series Rack Enclosures, possibly one of the most versatile in Middle Atlantic’s entire line. When the need for co-location enclosures or easy side panel access arises, this is the perfect enclosure to meet those needs and more. Pre-configured enclosures are available, geared towards various common applications and including all the accessories you need-and more. Enclosures come with open sides, however, models with side panels are available.