Specification Material: PET & Plastic Color: Clear Length: 3.5 inch Width: 1.75 inch Diameter of Suction Cup: 2.3 inch Package Include: 4 x Suction Cup Hooks Please read instructions first if you are not sure how to use it. Heavy Duty Suction Cup Hooks Strong Bearing Capacity ---- 6.6 LB / 3 KG Double vacuum suction ensures it can work in different temperature. The transparent materials design will not turn yellow or reduce adhesion over time and matches with any home style and atmosphere. No need extra tools like glues, screws or nails, just a few seconds to finish installation, it can be reused that is greener and more economical. Very friendly for the tenants and travelers because when you remove the suction hooks it won’t damage the wall and no scratch left. Please make sure the surface is clean and dry, free from dust, water and oil. Please confirm whether the suction cup hooks sucks firmly before hanging heavier objects or valuable items.