Applications: Suitable for fish tanks, aquariums, and clean, smooth glass surfaces. Not suitable for rough or dusty surfaces. Airline tube holder: Suction cup holders are made of PVC rubber and silicone, providing a firm grip on the surface of fish tanks or aquariums. Ideal for securing soap dishes, bathroom accessories, kitchen organizers, hanging signs, and small lights on windows during holidays. Ensure the surface is clean, dry, and smooth for best results. To remove, simply pull up on the release tab to break the suction. These suction cups are versatile and suitable for home decoration, holiday decorating, organization projects, and hanging handmade decorations, especially during festivals. Color: Transparent. Material: PVC rubber and silicone. Size: 20x28mm. Package Contents: 60 x suction cups for aquarium. Only the listed items are included; other products are not part of the package. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3cm.