HIGH QUALITY: The handle body of our glass suction cups is made of aluminum alloy, which is extremely sturdy and long-lasting, while the suction pads are crafted from natural rubber. USAGE: This suction cup works as a floor gap fixer to repair gapped laminate floors, ensures safety in the bathroom, serves as a tile suction cup lifter, acts as a rail during showers, functions as a wake shaper, and aids in moving heavy glass walls and aquariums. CUPS SPECIFICATION: The cup diameter is 4.7 inches, the suction pad thickness is 7mm, and the maximum lifting weight of the glass suction cups is 220lbs. STORAGE & CARE: Keep the suction cup stored clean and dry, avoiding moisture and direct sunlight. It should be mounted on a clean, smooth, flat, non-porous, and dry surface. If you have any questions about product quality or are unsatisfied, feel free to contact us.