SKB 1SKB-R6S 6U Roto Shallow Rack Case with Steel RailsThe black 6U 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 six vertical rack units. There is a water resistant gasket in the lid and a side grip handle. SKB 1SKB R6S