Bathroom Accessories Shelf basic has magnets built into the back side, so it fastens to steel & magnetic surfaces. The shelf will work on your refrigerator if it has a flat surface. Maximum load depends on the quality of the surface you will hang the shelf onto. We recommend using 3S magnet panels, which you can find in the shop or order in custom size. Bathroom Accessories Shelf basic is an accessory from 3S Magnet - magnetic storage system, which is composed of wall panels & magnetic accessories. MATERIALS: Powder coated steel Magnets DIMENSIONS: L - 6'' W - 4'' H - 1.6'' L - 15 cm W - 10 cm H - 4 cm COLOR: WHITE / BLACK / GRAPHITE (dark grey with metallic effect) WEIGHT: 0,5 kg 1 lbs MAxIMUM LOAD: MAx. 2,5 kg MAx. 5,5 lbs Guaranteed only with the use of original 3S design wall panel. The load-bearing capacity depends not only on the strength of the magnets, but above all on the quality of the surface. On a regular refrigerator the magnetic accessories hold approximately 30% of what they would hold on our original 3S magnet wall panel. MOUNTING: MAGNETIC FASTENING WALL PANEL NOT INCLUDED!! Magnetic Steel Bathroom Shelf Minimalist Storage Organizer