Loss of reflux to prevent the washing machine from designing the sealing of the washing tube drainage. To inform the smell and reduce the smell of the sewer at home.Two perfectly designed drainage systems, connected to the sink and washing machine, with reasonable and efficient space saving.The unblocking open opening, the water flows faster, the drainage is soft without blocking, and the safe and efficient pipeline is maintained.The seal is very good: multi-distributed tight ring, silicone material, brass material, closer, transformed and sealing transactions, it is not easy to deform when pressed.Large scale applications are suitable for kitchen, bathroom, garage, basement, to reduce the sewer blockage and prevent odor.Every family needs.You can use anti-invasive, deodorant, powder prevention, drainage / floor pipe, dura ABS material ble, elastic forming, flexible biological silicon, can connect multiple pipes, suitable for T panels, suitable for bell shapes, suitable for bells, Suitable for U type panels Straight, curve and t-shirts are modular designs and combinations free.Package includes:Floor drain connection + seal cover + spare small head + spare silicone sleevePay attention:< /p>1. Due to manual measurement, please allow 1-3cm errors. Thank you for your understanding.2. Monitor calibration is not the same. The color of the items displayed in the photo may be slightly different from the real object. Please take reality as the norm.