COLOR MARK There is a color mark on the suction cups of the bathroom handle, which is displayed in green to indicate that the handle is well adhered; if it is red, it means the handle is not pressed firmly and there is air under the suction cup, which will cause the shower handle to slip. Please be sure to pay attention to the marks when installing the handle.DURABLE NONSLIP The handle is made of ABS plastic material, which is durable and wearresistant. The sturdy suction cup design works on all nonporous surfaces, including smooth tile, glass, and porcelain.EASY TO USE Place the tub grab bar on a clean, smooth, nonporous wall surface, then open or close the suction cup locks on both sides; you can easily complete the installation or removal of the handle.NO DRILLING SUCTION CUP DESIGN This handle with suction cup is removable and can be reinstalled without tools or drilling. You can change the position of the handle in the bathroom at any time according to specific needs.WIDELY USED The shower handle surface is concaveconvex textured rubber, comfortable and nonslip. This product provides safety protection for bathrooms, bathtubs, and toilets; it is very suitable for the elderly and children.