This is a foldable, magnetic door stopper. You step on the protrusion with your foot to hold the open door in place. It cannot be installed on doors where the space between the bottom of the door and the ground is more than 10cm. I am selling it because I no longer need it after moving. The rubber part of the door stopper's protrusion is missing. There is no problem with use. It has been used, so there are stains and scratches. Please understand. Size (approx.): Width 4.5 x Depth 3.5 x Height 16cm Weight (approx.): 280g