Durability: This fully rack mount rail is made from cold-rolled steel, 4-port fixed can support a weight of up to 220lbs (100kg); Electrostatic powder coat preventing rust and corrosion Flexible Depth: Server rack shelf rail with adjustable depth from 20.9 to 32",suitable for racks of different depths Widly Application: Compared to the 19 "cantilever shelf, this fully bracket rail has no width limit,can be applied to server racks of 10 ", 19 "and so on Ventilation:Vented shelves increases ventilation efficiency and heat dissipation to protect equipments long-term use Installation:Equipped with a complete set of accessories,and it is easy to install,with instruction or video for reference Tecmojo server rack rails represent an exceptional option for those seeking a versatile and reliable solution for non-rack mount devices. Adjustable depth feature is a standout attribute, ensuring seamless compatibility with a wide array of racks and cabinets, irrespective of their varying depths. The innovative bottom-suspended design is particularly advantageous for devices that dissipate heat from their underside, as it allows for more efficient cooling and helps to prevent overheating. The rack mount shelves also possess no restrictions regarding rack or cabinet width, while simultaneously fulfilling the crucial requirement of securely supporting devices. All advantages make Tecmojo 4-port rack mount rails an ideal assistant for diverse environments and configurations.