Stainless Steel Material: 304 stainless steel with environmentally friendly spray coating for resistance to corrosion, rust and oxidation. Smooth and shiny surface with polished edges. Installation Method: 1.3M adhesive tape, strong and waterproof, easy to install and non-removable. 2. Perforated Installation: Each product comes with the necessary screws for installation, allowing you to easily choose the appropriate installation method (screwdriver not included). Attention: For installation with 3M adhesive tape, please stick the toilet paper holder on a smooth surface, press for a few seconds and wait 24 hours before hanging anything, for better durability. Dimensions: 14 x 10 x 9.5 cm Compatible Wall Surfaces: Our toilet paper holder can be installed on various surfaces, including ceramic, tile, marble, metal, glass, etc. We do not recommend installation on uneven or rough surfaces, such as painted or wallpapered surfaces.