Package Contents: you will be provided with 1 piece of 1U rack shelf and 1 Piece of 2U rack shelf, equipping with 8 sets of square rack nuts and crews to meet your installation needs; Please note that there may be a slight bending phenomenon during transportation, but it will not affect the use Effective Ventilation and Heat Dissipation: the cutout design of the server rack shelf helps to ventilate and dissipate heat of your equipment, keeping your computer and AV equipment cool in your home or office for longer periods of time Universal 19 Inch Fit: network shelf is designed to fit the EIA-310 standard 19 inch server rack, this vented server rack can accommodate an internal depth of 14.5 inches for your data, networking, providing additional storage space for your tools, audio and video accessories, and can be applied in combination with a distribution rack Reliable and Practical: rack mount shelf is made of metal material, not easy to rust, can ensure long term use; The c