42*53mm Wide Application: The shower floor drain backflow preventer is designed for drains of about 35-37mm, suitable for most of your kitchen and bathroom sinks, toilet floor drains. Unique Design: No matter how much water is in the shower floor drain, it can discharge quickly, drain quickly without water accumulation. Self-cleaning by rotating to keep clean at all times. Easy to Use: The floor drain backflow preventer is easy to use and install. Insert the product directly into the end of the drain. When the filter element needs to be cleaned, it can be directly removed from the sewer through the handle. Closed isolation technology: Since the shower drain core is connected to the underground septic tank, prevent sewage or other air from entering the room through the odor drain pipe. Every family needs a high-quality floor drain core to prevent foreign matter from flowing out. High-quality materials: The shower floor drain plug is made of high-quality TPR and ABS material, which is