The new SKB-REX6 Expander Rack gives added rack space to the SKB19-R1406 Mighty GigRig. The SKB-REX6, 6U Expander Rack Case features a 6U extended depth rack that can be locked securely to the new SKB19-R1406 Mighty GigRig for a total of 12U on the front of the combined units. With the option of adding an additional 6U of rear rack rails to the SKB-REX6 as well as the SKB19-R1406 Mighty GigRig expanding to 12U in the front and 12U in the rear for a total of 24U capacity in one rolling rack unit.The SKB-REX6 Expander Rack allows for top to bottom access interior cable routing up through the bottom of the SKB19-R1406 Mighty GigRig, making the unit the perfect solution for housing all of your electronics and sound gear and keeping it all connected making the unit a studio on wheels.