A 2U high rack tray with three piece construction. The sides attach to the base tray by 3 M4 screws (included), screwed into hank bushes. If equipment is tight for space simple slacken screws until equipment can be positioned in tray, then tighten screws. Tray can only be inverted to provide additional 13mm extra usable height. Much greater rigidity than El Cheepo 'one piece' constructed versions. Finished in black epoxy resin. They are able to support up to 20kg evenly distributed. (Note: Most cassette recorders and CD players are 3U high.) The Rack Tray is 294mm deep.