[Brass Floor Drain] Our shower floor drain is made of high-quality rust-proof brass and silicone sealing ring. Enjoy fast drainage. [UNIQUE DESIGN] Our one-way drain valve is designed to automatically open when draining and automatically close when there is no water, effectively preventing odors and backflow. [EASY INSTALLATION] Our floor drain check valve is plug and play, girls can also install it easily, no tools required, plug and play, for 1.25"-1.65" hole. [MULTIFUNCTIONAL APPLICATIONS]: Our drain check valve is compatible with most standard floor drains and is suitable for use on floor drains in bathrooms, showers, toilets, kitchens, balconies in a variety of settings.