The package includes 8 cleaning heads, which is sufficient for long-term use. The replacement head for the toilet brush is composed of sponge (polyurethane) and PP (polyethylene). These are environmentally friendly materials and can be recycled and reused. The toilet brush replacement head contains detergent, and you do not need to use additional cleaning liquid to clean the toilet. The toilet brush replacement head releases detergent immediately upon contact with water, and it releases cleaning foam when the sponge is pressed down during cleaning to help you clean better. Disposable toilet brush heads are widely used in toilets, sinks, bathtubs, bathroom walls, floors, etc. Each brush head is independent, and you can use it for compatible cleaning in various scenarios. Disposable Sponge: The sponge head can clean hard-to-reach places under the rim of the bowl and the drain pipe for compatible deeper and faster cleaning.