<p><b>Product Information:</b> </p> <ul> <li>Materials: ABS Plastic, Metal<br></li> <li>Length: 3.5 inch</li> <li>Width: 2.5 inch</li> <li>Package Include: 2 x Suction Cup Hooks<br></li> </ul> <p></p> <p></p> <p><b>About Installation:</b></p> <p>1.Clean the smooth surface, pay special attention to making it dry and dustless.</p> <p>2. Press the suction cup hook on smooth surface to push out the air.</p> <p>3. Rotate clockwise to locking it on smooth surface.</p> <p><b>About Remove:</b> just rotate counterclockwise to exhausting air and then can take it off.</p> <p><b>Warm Reminder:</b> Please confirm whether the vacuum suction hooks sucks firmly before hanging heavier objects or valuable items. </p>