The Tunze Multi Tube Holder is designed to securely hold up to four hoses for systems like the Osmolator® and Osmolator® nano, as well as other fastening needs. It accommodates hose diameters from 6 to 7 mm (0.236" - 0.276") and can be attached to panes or materials with thicknesses ranging from 0 to 22 mm (0 - 0.866"). This versatile holder ensures stable and organized hose management in your aquarium setup.