Release the stresses of the day with the fun Legami Knockout – Tabletop Punching Bag. Perfect for at-home and in-office use, simply attach to any flat and smooth surface using the suction cup base. This unique accessory is equipped with a sturdy iron spring and hand pump to make it easier to inflate. Bag diameter: 18 cm Material: iron, PU Note: for the suction cup to remain securely fixed, both the suction cup and the surface must be clean and free from dust and other dirt residue. Only attach the punching bag to smooth and flat surfaces. Do not leave the punching bag attached to the surface unattended for long periods. Do not attach the punching bag to the ceiling or other dangerous places.