Material: PVC+ABS+Glues Size: 60×60mm Screw rod length: 6,8,10,12,14,16mm. Installation steps are as follows: 1. Wipe the surface. 2. Peel off the film on the back. 3. Press the hook onto a smooth surface for a few minutes. Note: It works on a variety of surfaces, such as wood, tile, metal, glass surface and more. Please pay attention to the painted walls, when removing it, it may peel the paint off the wall.