12cm Ceiling Sticky Hook, Mosquito Net Hanger accessories, Dual function Sticky and Screw hook, Round Mosquito Net Hanger.Diameter: about 12cm The sticky slice is strong enough on the wall for most surfaces (except in extremely rough surfaces) The screw can be alternatively used for extra support.Instructions: Heat the sticky tape by lighter before use Remove the back paper (avoid touching the sticky surface) Press the hook on the wall/ceiling for at least 30 seconds