FUNLAVIE Suction Cup Hooks Rotate & Lock Powerful Heavy Duty Metal Vacuum Suction Cup Hook Hangers, 1 Pack Vacuum suction cup hook-easy installation without glue or tools via rotate and lock suction technology. Suction cup hooks only work on smooth surface such as ceramic tile, mirror, glass, and acrylic surfaces. Suction does NOT work on granite, marble, porcelain, quarry, stone, wood, dry painted wall, metal, brick or any surfaces that are rough, uneven or porous Heavy duty suction cup hooks could hold up to 11-22 LB. Material: ABS+Chrome Plated Polyurethane. Suction Cup Hooks Dimensions: 2.5 inch, diameter, Hook Length: 0.75 inch. Package including: 1 pc vacuum suction cup hook.