The black 4U Roto Shallow Rack Case with Steel Rails from SKB is a rotationally-molded shallow rack case with multiple applications, including holding equipment such as computers or music players which are "rack-able" or which can be screwed into the case. This case has steel front and rear threaded rails with a rail-to-rail depth of 10.7" and four vertical rack units. There is a water-resistant gasket in the lid and a side grip handle.