High adaptability and compatibility make it reliable and practical. Simple and convenient installation saves time and effort. Anti-reflux and odor-resistant features enhance functionality. Multiple sizes allow selection based on individual needs. Made of plastic material for durability. Available in three sizes: S, M, and L. When water enters the floor drain, the weight of the water opens the bottom ABS gasket, allowing water to flow freely. Once water flow stops, the ABS gasket closes automatically by gravity, creating a complete seal that prevents pipeline gases and overflow from rising. Helps prevent odors in summer and maintains indoor climate control in winter. Item Name: Odor-proof Floor Drain Core Material: Plastic Features: Anti-reflux, Easy to Install, Fully Sealed Usage Instructions: S: Suitable for floor drains with inner diameter of 26–35 mm, installation height over 43 mm M: Suitable for floor drains with inner diameter of 36–42 mm, installation height over 47 mm L: Suitable for floor drains with inner diameter of 36–53 mm or PVC pipe with 50 mm inner diameter, installation height over 50 mm Size Details: S: 4.3 cm x 3.6 cm / 1.69" x 1.42" (Approx.) M: 4.6 cm x 4.3 cm / 1.81" x 1.69" (Approx.) L: 5 cm x 5.4 cm / 1.97" x 2.13" (Approx.) Notes: Due to differences in lighting and screen settings, the item color may vary slightly from images. Slight dimensional variations may occur due to manual measurement. Package Includes: 1 x Odor-proof Floor Drain Core