Super easy installation: Make sure you have the right size before purchasing! Suitable for 0.87 inch (2.2 cm) shower heads. No tools required, self-priming installation, no drilling required, simply place the suction cup to grip the contact surface such as glazed tile walls, mirrors, glass, etc. [Vacuum adsorption principle] Stickers are recommended for all walls. Make sure the contact surfaces are clean before use. Super strong suction cup, diameter approx. 2.8 inches (approx. 7.8 cm), silicone material has good airtightness, suitable for metal surfaces, smooth glass, smooth wood, smooth ceramic tiles. But not suitable for textured tiles, concave tiles, frosted glass, and rough wood. Removable design: The removable shower head holder allows you to reposition the shower arm at any desired height for easier use. Suitable for most, but not all, shower heads. Make sure you have the right size before purchasing! ADJUSTABLE ANGLE: Thanks to the adjustable design, you can adjust the shower