Strong Dual-Reinforcement Design Suction cup hooks combine powerful vacuum adhesion with nano adhesive, securely holding items weighing up to 11 lbs (5 kg) without slipping - even in humid bathrooms and kitchens. With a wide temperature tolerance ( -40°F to 300°F / -40°C to 149°C ), it withstands repeated durability testing and repositioning. After cleaning, suction power recovers to approximately 99%, ensuring long-lasting, reliable performance.Waterproof & Durable TPE + ABS Material The suction hooks are made of high-quality TPE and ABS plastic, and these white suction shower hooks are fully waterproof, weather-resistant, and anti-aging, ideal for humid environments while blending smoothly into any decor.No Drill, Damage-Free Installation Renter-friendly design with easy installation - simply peel off the adhesive backing of the suction cup hook, press to secure, and snap it onto the switch for a firm hold. The reusable feature allows flexible positioning on smooth surfaces without drilling, screws, or mounting hardware. (Ensure the wall surface is clean.)Removable & Reusable without Residue Remove shower suction cup hooks easily with a credit card and reuse again and again. Simply rinse the suction cup with warm water and dry to restore full adhesion - leaving no marks or damage behind. (When removing the hook with a credit card, avoid applying excessive force. Gently pry the suction cup to prevent damaging the wall or breaking the credit card.)Suitable SurfacesThis suction cup hook is specifically designed for glass, tile, , metal, and stainless steel surfaces. Not suitable for grout lines, textured surfaces, damp/greasy/cracked/lime-covered surfaces, or cement walls. If the hook adheres firmly to glass but fails to adhere to a wall surface, this indicates surface incompatibility. Should this isolated issue occur, please contact us for satisfactory after-sales service.tile for Multi-Surface Use Perfect as shower towel hooks, bathroom organizers, or entryway hangers. Works on tiles, glass, painted wood, metal, and other smooth non-porous surfaces - 4 * hooks included for flexible storage.