UpperSpace Adjustable Shelf Makes your small containers instantly visible and easily accessible by utilizing the upper space in your cabinets. Installs in cabinets with an inside measurement of 13 to 36. Increases valuable cabinet space by freeing up shelf space. Utilizes the existing shelf support system found in most of todays cabinets that allow shelving to be adjustable. No holes in your cabinets? No problem. The UpperSpace Shelf may be installed using special 3M mounting tape provided for all brackets and provided pins.