SKB 6U Space Rack with Wheels and Handle Has a depth of 17.75" and accommodates 19" rack mountable equipment with 3, 4, 5 and 6 rack space models. Made of polyethylene rotationally molded polymer with two 2.5" in-line skate wheels and an industrial pull handle. Has a rear access panel, is Roto molded for strength and features an interlocking X pattern for solid stackability. Features recessed latches, a molded-in handle, and shock absorbing feet. Cases interlock and stack with each other.