Powerful Suction: Newthinking bathroom handrails are made of ABS and EDPM rubber, which is corrosion-resistant and waterproof. Powerful suction cups provide additional stability and can support up to 250 pounds, providing assistive support in the shower to prevent falls for the elderly, disabled, or injured. Please don't put all the body on the shower handles suction Vacuum Pump & Warning Wire: This suction handrail is designed with a vacuum pump to completely expel the air by pressing, and the good sealing makes it impossible for water and air to break the vacuum adsorption environment. When the red warning line is not visible, it means full adsorption, and when the red warning line is visible, it means that the suction is insufficient and needs to be reinstalled. Suggestion: Check the adsorption capacity before use, and be sure to reinstall it when the red warning line lights up Easy to Install and Remove: Press the tub suction cup handle to a flat wall, then press the vacuum bar by hand until the red warning line on the vacuum bar disappears, indicating that the suction cup is securely attached. When disassembled, simply lift the black clip and the entire shower handle will easily come off. No drilling, no screws, no glue and no tools, fully removable, reusable and won't damage your walls Applicable Surface: The Shower Handle offers balance assistance for the elderly, handicapped, children, injured and anyone who needs extra stability support. Please pay attention that the bathroom grab rails ONLY stick on smooth and non-porous AIRTIGHT walls, which are NOT air-permeable like metal, glass, tile, marble, stainless steel, but do NOT apply on uneven tile, unfinished marble, wallpaper, dry wall, porous wall, etc Notes: Get the best stable support. (1) This suction grab bar is only suitable for tile sizes larger than 5.2" x 5.2". (2) The suction cup cannot be installed on the grouting joint. (3) The installation surface must be flat and smooth, suitable for any surface. (4) It is recommended to check the stability before use to ensure safety. If you have any problems during installation and use, please contact us, and we will provide you with installation and use guidance as soon as possible, Manufacturer: Newthinking