Pack of 30 large suction cups: the actual size of the suction cups is 40 mm. Each cup can hold up to 2 kg. Easy to hang: the supplied threads and knurled nuts make it easy to attach the material to be joined. Perfect for hanging wreaths and larger ornaments on windows, mirrors or any other clean, smooth, non-porous surface. Once applied, it is not affected by heat or cold. High QualityThe bathroom storage hook is made of high-strength transparent PVC, which is beautiful, sturdy and waterproof. . Easy to reuse, just wash and dry gently. Traceless Removal: Suction cups will not yellow, deteriorate or lose adhesion over time. Use the flat blade to release the vacuum so it's intact, streak-free, and ready to use again. Instructions: Make sure the surface is clean. Use only on smooth surfaces such as glass, metal, tile, plastic, bakelite, etc. Press the suction cup against the surface to release the air at the bottom of the suction cup. After detecting the object, make sure the suction is safe.