The distinctive feature of this gray shower grab bar lies in its glow-in-the-dark handle. After being exposed to natural light for a period of time, it can emit a soft glow even in darkness, providing clear visual guidance for the elderly, effectively preventing slips and further enhancing bathroom safety. The diameter of this shower grab bar is 5.1 in. thus the diameter of the installation surface (such as tiles) must be larger than this size. The product is specifically designed for smooth and non-porous surfaces like tiles, marble, glass, wardrobes, and metal surfaces. Uneven or textured surfaces may compromise the suction cups' stability. Ensure that water-stained walls are cleaned before use. The grab bar boasts an impressive suction capacity of 418 lbs. with a thick and anti-slip handle that offers users peace of mind. However, please note that it primarily provides assistance for those with limited mobility and is not recommended to support the full body weight. This shower grab bar comes with an innovative red safety line design, making it easy for users to check the product's safety status at any time. If the line lights up, it indicates a slight loss of suction. Don't worry, Simply repress the pump button until the line light goes off, and the safe usage condition is restored. Material: Acrylonitrile Butadiene Styrene (ABS).