ROOS Self Adhesive Stick on Clean Wall Hooks Pack of 6 (3.5cm*2.4cm) Material:plastic Size:3.5cm*2.4cm Simple installation, do not need hardware.biggest bear weight 1kg Please make sure that is a clean surface before paste, do not have water and dust The best way to stick is that press tight 10 seconds or more, to keep sticky solid and hanging things after 24 hours