Product Name: Cuttable Copper - core Floor Drain. Product Materials: Copper / Rubber. Product Dimensions: Diameter 100mm (3.93 inches), Inner - core diameter 42mm (1.65 inches), Bottom diameter 32mm (1.25 inches), Height 45mm (1.77 inches). Due to manual measurement, there may be an error of 1 - 2cm. Please refer to the actual product. Application Scope: Suitable for floor drains with a diameter of 32 - 100MM. Product Features: Odor and Back - flow Prevention: After the drainage stops, the floor - drain core automatically closes, effectively preventing sewer odors and sewage back - flow, with good sealing performance. Rapid Drainage: It can open and close at approximately 90, ensuring fast and smooth drainage, and is not prone to blockage. Close Fit: With a pull - up design, the odor - proof floor - drain core can be quickly inserted without affecting daily life. Adjustable Diameter: Equipped with a variable - diameter ring, it can be cut as needed to fit floor drains of different sizes. Gravity - sealed: Using the principle of gravity - sealed, it has the functions of odor prevention and anti - overflow. High - quality Material: The copper - core material is of excellent quality and has strong durability.