This economy solid steel 4 RU panel is constructed of 14 steel finished in attractive -052 flat black Electrostatic powdercoat. 4 Rack Spaces. Atlas Sound Panels Provide Aesthetic Continuity and Security for Unfilled Cabinet Spaces. Includes Oblong Mounting Holes on E.I.A. Universal Spacing for Adjustment Flexibility. Solid Model Offers Dust Protection. Stocked in Textured Black Epoxy. Color: Ebony Black. Panel Type: Steel. Rack Spaces: 4. Dimensions: 7 H x 19 W x 5/16 D.