Widely use: 3 various sizes in diameter :Large 2.5"(7pcs),Medium 1.7"(10 pcs),Small 1.2"(10 pcs),3 size mixed, for different smmooth surface. It isn't suitable for powder painting wall, stone wall, wood wall and other rough walls. Super suction: Thicken clear PVC suction cup ,hold up to 6lbs,provide a tight hold on smooth, non-porous surfaces, including appliances, windows, mirrors,glass, metal, ceramic tile, plastic,formica, etc. Removable: Have a release tab for easy removal, no tools needed,install and tear off only few seconds. Hooks and suction cups are detachable and can be used separately without any damage to the surface Application: Use for Decoration,Shower,Kitchen,Door,Wall, Great for hanging small bathroom items outdoor wreaths,decorations in windows and all sorts of small toys, jewelry, key chain, etc Note: Allow the suction cup to set for 24 hours before adding any weight. Please confirm whether the suction cups hooks sucks firmly before hanging heavier objects or valuable items. If the suction cup is deformed during transportation, soak it in hot water for 3 minutes to restore original shape. Please make sure the surface is clean and dry, free from dust, oil. Apply some water to the suction cup, the suction will be more firm.