Prodcut Name : Suction Cup Hook;Material : PlasticColor : Clear;Suction Cup Diameter : 40mm/ 1.57"Hook Height : 3cm/ 1.2"Net Weight : 38gPackage Content : 5 x Suction Cup Hook Hanger Installation sites: Smooth surface (tile,glass ,graite ,stainless steel , plates and so on. No nails, No holes at wall. Applicated in kitchen, washroom, bedroom, wardrobe and so on. Usage: Clean the surface of the wall with a dry cloth, then put the black cup hardly until it sucks the surface. Loaded booster board, Tightened up plastic triangle, put a small iron.