Suitable for any smooth flat surfaces.The best part is that it can be placed in any corner of the sink you want and hold the sink caddy in place.The suckers are stick to countertop instead of sink, so they support more weight and more steady. There are white and blue and pink colors available .The three bright colors make your countertop more beautiful, fashion, energetic.Make your sink unique! An open platform at the top makes it easier to place sponges ,rags,Scrubbers.etc.The bottom has many small holes in right size to provide good drainage and allows the sponges and rags to dry fast. No rust, no mildew! It can be easily cleaned with soap after a long time use.The sink caddy is easy to disassemble and install, and will not hurt the sink. One package contains two sponge holders for better configuration of your sinks。The perfect part is this doesn't take up a lot of space in the sink. This is a kitchen must have!