Our lower sliding racks can not only be combined with the vertical lifting upper-level rack but also be paired with the vertical pressing upper-level rack. The vertical pressing upper-level rack is simple and durable. Although its user experience is not as good as the vertical lifting upper-level rack, its cost is significantly reduced. For cost-sensitive customers, the vertical pressing upper-level rack can be selected as the preferred solution. The upper level adopts a single-column design, allowing the spacing and angle between two adjacent columns to be freely adjusted during installation, offering considerable flexibility in layout.