Size:1 Suitable for surface of glass, wood, metal, ceramic and so on...but does not work on uneven walls. Easy to install, without any tools or screw; and can be moved at any time. Can be used in different ways. Properly clean the wall of the installation surface, and dry it. Clean the suction cup, put the hook on the necessary location, and press. The suction power source depends on the absence of air in the suction cup, so the surface should not be concave-convex, have holes, or get wet. , bags or backpack. This multi-purpose hook keeps your room organized and removes the mess of items that may be lying on the floor. Note: The data is manual measurement, please please allow 1-149cm error, due to the light and screen differences, there will be a certain color difference, the specific received in kind prevail.