1. Wide application: This anti-backflow device for shower floor drains is specifically designed for sewers with a diameter of approximately 35 - 37 millimeters. It is suitable for most sinks in kitchens and bathrooms, as well as floor drains for toilets. 2. Unique design: Regardless of the amount of water, this shower floor drain can drain water quickly without causing water accumulation. It can be self-cleaned by rotation to always stay clean. 3. Easy to use: This anti-backflow device for floor drains is convenient to use and install. Simply insert the product into the end of the drain. When the filter element needs to be cleaned, it can be directly removed from the drain through the handle. 4. Sealing and isolation technology: Since the core part of the shower floor drain is connected to the underground septic tank, this device can prevent sewage or other odorous air from entering the room through the drain pipe. Every family needs a high-quality floor drain core to prevent foreign matter from discharging. 5. High-quality materials: This shower floor drain plug is made of high-quality thermoplastic rubber (TPR) and acrylonitrile - butadiene - styrene copolymer (ABS) materials. It is durable, reusable, and odorless.