SANNO replacement suction cups(2 pack) for shower caddy, soap dish, hooks

SANNO suction cups(2 pack) Only fit for SANNO's products:shower caddy, soap dish, hooks The installation video ,you can search " nRCj6Uqm2sQ" on youtube. My video title “ SANNO Installation Tips - Shower Caddy with Vacuum Suction Cups ,Storage Shampoo Conditioner, Soap'. ATTENTION:Only Fit for any NON-POROUS & SMOOTH surface . CANNOT maintain on porous or rough surfaces: Marble ,Paint wall, Porcelain , Nano Tiles , Plaster and wood , or across grout lines . If the unit falls off the wall or you want to relocate it,it may be reapplied by cleaning and drying the suction cup, repeating the installation process and again tightening the knob with as much hand pressure as possible.