Fits shower hose bottom diameter 18~23mm (0.7~0.9 inches), not for 23mm. Recommended to measure size before purchase. Best for non-porous smooth surfaces like glass, mirrors, ceramic tiles, etc. Not suitable for uneven surfaces. Easy installation in 1 second, no drilling or screws needed. Stable, waterproof, rust-proof, no wall damage or marks after disassembly. Made of engineering grade ABS plastic, waterproof, rust/corrosion resistant for long-term use in humid bathrooms. Rotating design allows 70-degree angle adjustment. Suction cups are removable and replaceable. Suitable for high/low positions, inside/outside bathtubs, ideal for family use. Specification: Material: ABS; Weight: 150g; Dimensions: 11.4*7*6.4cm/4.48*2.75*2.52 inches (L*W*H). Notice: Allow 1-2cm differences due to manual measurement. Color as shown. Due to monitor differences, picture may not reflect actual color. Packing list: 1 shower holder