- Color options: two finishes available - silver plated or copper. Outer diameter 4.2 cm (1.65 in), height 3 cm (1.18 in), bottom drain opening 2 cm (0.78 in). Suitable for sewer holes with diameter 4 cm (1.57 in). - Automatic gravity drain switch: when draining, the bottom cover opens automatically with the water flow; when not draining, it closes automatically. Equipped with a three-layer sealing ring to effectively prevent odor, sewage, cockroaches, mice, and other intrusions, helping maintain a clean living space. - Smooth and efficient drainage: designed for 90-degree direct drainage with a large bottom opening of 2 cm, which promotes fast and smooth water flow and helps prevent water buildup. - Easy installation: plug and play in three steps - open the floor drain cover, install the drain plug, close the drain cover. No additional tools or tile cutting required. - Material and durability: made of selected copper with good corrosion and rust resistance, smooth surface, easy to clean, and durable for long-term use. - Wide compatibility and applications: suitable for a variety of floor drains and commonly used areas including bathrooms, swimming pools, balconies, garages, basements, and toilets. - Practical use scenarios: - In a bathroom floor drain, the plug helps prevent sewer gas and pests while allowing normal drainage during showers. - On a balcony or outdoor drainage, it minimizes odor and pest ingress when not actively draining. - In a garage or basement floor drain, it provides reliable backflow protection while maintaining easy maintenance.