Reliable and Reusable: These suction cups are made of quality ABS, PVC, and spring steel materials, strong and not easy to break, waterproof and reusable, providing reliable performance for everyday use. Easy to Use: Window suction cups offer good adsorption; simply press them firmly onto a smooth and clean surface for secure attachment. If needed, add a small amount of water to enhance suction. Good Helper: Suction cup clips are ideal for holding wet towels, duster cloths, or sunshades, and can also hold cards, notes, and bills, helping keep spaces organized and clutter-free. Note: Do not exceed 200g per suction cup to ensure secure hold. Applicable Occasions: Suitable for use in kitchens, homes, bedrooms, bathrooms, shops, stores, cars, on refrigerators, windows, and more. Clips can hold small items for everyday convenience. Sufficient Quantity and Proper Size: Includes 2 black and 2 white suction cup holders. Each measures approximately 3 cm (1.18 inches) in diameter. The practical size and quantity meet daily needs and allow for replacements.