Aprince Suction Cup Shower Head Holder / Universal Adjustable Chrome Cupula Sprinkler Base Bathroom Shower Head Bracket Holder (Style A) Design Specifically for shower head holder. Material: Plastic and Chrome. Total Size(LWH): 16*8*6 CM Suction works best on ceramic tile, glass, mirror, granite, stainless steel, acrylic, laminate and any non-porous surface with glossy finish. Suction will NOT work on stone, wood, sanded tile, porcelain, marble, dry wall & any surface that is bumpy, porous or matte finished.