"The iDESIGN Rustproof Aluminum Turn-N-Lock Suction technology adheres to smooth, clean surfaces, including tile, glass, fiberglass, and metal. To install, press firmly and turn knobs clockwise until they stop to create maximum hold. This bathroom shower corner basket has 1 large basket to hold shampoos and conditioners. Holds up to 6lbs. Four maximum hold suction cups and directions included. Made of aluminum with silver finish. Measures 12"" x 7.3"" x 5.35"". Gender: unisex."