This is a high-impact plastic, rough duty, element-resistant carrying case. The “S” Case is lined with die-cut foam to insure recorder protection. Use this case with the 1- and 3-phase metersocket recorders. It can also be used with the Revolution, Eagle, and Ultra Slim flex CTs (current probes). The size is approximately 12″ W X 16″ L X 7″ H.