Specifications: This floor drain seal check valve is made of high quality material, and has good bending and sretching ability. It features waterproof, leak-proof and odor-proof. The valve is very suitable for washing machine, sinks and other connected drain pipes with sewers. Item Name: Floor Drain Seal Check Valve Material: Metal, Silicone Features: Durable, Deodorant, Easy to Install Size Details: A: 9.8cm x 5.3cm x 5.3cm/3.86" x 2.09" x 2.09", Suitable Aperture: 40mm - 50mm/1.57" - 1.97", Suitable Depth: ≥65mm/2.56" (Approx.) B: 9.9cm x 4.8cm x 4.8cm/3.9" x 1.89" x 1.89", Suitable Aperture: 35mm - 40mm/1.38" - 1.57", Suitable Depth: ≥65mm/2.56" (Approx.) C: 9.7cm x 3.6cm x 3.6cm/3.82" x 1.42" x 1.42", Suitable Aperture: 25mm - 32mm/0.98" - 1.26", Suitable Depth: ≥65mm/2.56" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Drain Core 1 x Steel Ring 1 x Filter