Suction Cup Hooks, Aidodo 304 Stainless Steel Hook for Smooth Wall Shower Kitchen Window Bathroom Application:Great for hanging wreaths and larger decorations in windows, on mirrors, or any other clean, slick, non-porous surface. Rustproof: Manufactured from T-304 premium-grade stainless steel, with an added 18/10 Chromium/Nickel content to protect against corrosion & rust. Brushed Finish: Hand polished stainless steel finish, build to resist daily scratches, corrosions and tarnishing. No Damage:Easy to install and do not damage the wall or glass. Notice: Suction cup only works on smooth surface, such as glass, polished tiles/stainless steel surface.