Marathon Flight Road Case MA-RMXBLK Black Series - Case To Hold 1 x Hercules RmX Digital Music Controller Exterior Dimensions (closed lid): 18 x 16.75 x 8.25 Inches. Interior Dimensions (RMX space): 14 x 13.25 x 2 Inches. Interior Dimensions (Overall): 14 x 13.25 x 4.5 Inches. Net Weight: 15 lbs.