U-shaped pipe cleaning stick, suitable for a variety of pipe cleaning, descaling and odor removal! Using physical foaming vibration and chemical reaction, quickly dissolve and eliminate the dirt deposited in the pipeline to clean the pipeline, decompose oil and grease, prevent blockage and odor, do not stick to hands and do not stain, suitable for washbasins, vegetable sinks, floor drains, bathtubs, etc. Use one a month, a box can be used for a whole year! Note: The color is randomly distributed, the effect is the same