[Use on smooth surfaces]: Our suction cups adhere to all smooth surfaces, such as windows, glass, and tiles. However, water can cause them to fall. [Easy to store]: The included thread and clear knurled nut make it easy to organize kitchen accessories, install furniture, or attach decorative items. [Dimensions]: Diameter: 40 mm, M5 thread height: 10 mm. [Quantity]: 8 pieces. [Excellent customer service]: For questions regarding our suction cups, do not hesitate to contact us. Store use: If you are a retailer, these suction cups are ideal. They allow you to easily hang a display sign in your shop window. Car use: In warm weather, these suction cups allow you to hang a sunshade in your car. Simply attach them to the smooth window. Enjoy a comfortable ride. An indispensable kitchen utensil: If you need to organize your kitchen utensils, such as spoons and spatulas, our suction cups are the solution. They easily attach to smooth walls and allow you to hang your items securely. DIY decorations: If you are a fan of DIY decorations, suction cups are indispensable. They allow you to easily hang a variety of decorations and are also very practical for daily use.