The Package Contains:: 20 threaded suction cups | 40mm | M5 rod | Each weighs 2kg. Wipe the contact surface before use, press firmly and expel as many air bubbles as possible to increase suction. Advantage:: It is ready to use with one pressure and does not require no drilling or screwing with no glue residue. It has a powerful suction force that holds it well even in direct sunlight and in the heat of the car. Multifunctional:: Ideal for mounting sun visors in your car, string lights, labels, small metal baskets, shower shelves, fix signage, decorations on windows, etc. Applicable surface:: Suitable for smooth and flat, non-porous surfaces to form a vacuum space, such as glass, tiles, smooth plastic and metal, painted panels , etc. Not suitable for wooden panels, wallpaper, latex painted walls, etc. Our Service:: If you have any dissatisfaction or suggestions about our products, please do not hesitate to contact us and we will give you a satisfactory answer and solution. Our service: We are committed to providing you with satisfactory service. If you have any questions, you can contact us at any time. We will reply to you within 24 hours and try our best to resolve the problem for you. < /p>