Features: High quality material: This floor drain cores is made of high quality material, wear-resistant and corrosion-resistant, not easy to rust and break, durable. Magnetic levitation sealed: Using the principle of repulsion of magnets, it sealed when there is no water discharging, prevent odour and sewage overflow. When water is discharged, the pressure of the water flowing will open the sealing opening and close it quickly after the water is discharged. Unique drainage design: converts the gravities of the water flowing into centrifugal force, accelerating drainage and allowing water to drain quickly no matter how large it is. Wide range of application: the floor drain can be widely used in bathrooms, kitchens, toilets, garages, basements and other places where it is needed. Easy to install: installation is quite simple, directly into the drain. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Material: copper, magnets, stainless steel, silicone Product size: 4.75x4.3x4.3cm Features: anti-corrosion, anti-odour, anti-overflow, strong and durable Suitable for use: 3741mm hole diameter Package List: 1 x Floor Drain Backflow Preventer