With 1 sliding trolley on each side, they allow you to handle whatever you want on this tray that is sliding out and you can work freely without having to arrange the cables so you can see what happens freely is strong resistant and safe also protects your friction team and others. It is also designed in black color to improve the vision of the appearance of your Rack, and this also offers protection against corrosion, oxidation, scratches, detachment, strong acids, and alkaline erosion, to extend the maximum performance of this product, it has multiple holes for to be able to place it according to the need you have, the tray is also designed in resistant steel to withstand what is placed on top, also do not worry about the heat that your equipment may produce since it has ventilation slits for under it to avoid overheating at any cost.