Yaju transparent kitchen suction cups without hooks, 20 mm, pack of 30

YAJU 30-Piece Suction Cup Set for Securing Objects Together. These suction cups are useful for arts and crafts projects. For hanging handmade decorations, especially at Christmas. Diameter: 20 mm. Adheres to clean, dry, and smooth surfaces for hanging objects. Set of 30 clear plastic suction cups without hooks, 20 mm. Specifications: Quantity: 30 pieces. Diameter: 20 mm. Notes: The surface must be free of cavities, holes, and liquids. The suction cups do not adhere to wood or aluminum alloy surfaces; these surfaces must be polished. Ensure the application surface remains clean.