Ⅰ. Wide application: The shower floor backflow preventer is designed for drains of about 35-37mm, suitable for most of your kitchen and bathroom sinks, toilet floor drains. Ⅱ. Unique design: Regardless of the water volume, the shower floor drain can drain, drain without water accumulation. Self-cleaning by rotating to always keep it clean. Ⅲ. Easy to use: The floor drain backflow preventer is easy to use and install. Insert the product directly into the back of the drain. When the filter element needs to be cleaned, it can be directly removed from the drain through the handle. Ⅳ. Closed insulation technology: Since the shower drain core is connected to the underground septic tank, it prevents sewage or other air from entering the room through the odor drain pipe. Every family needs a floor drain core to prevent foreign matter from leaking out. Ⅴ. Materials: The shower floor drain plug is made of TPR and ABS material, which is durable and long-lasting, reusable and odorless.