Sydien 2Pack Silicone Drain Backflow Preventer One-Way Valve for Pipes Tubes in Toilet Bathroom Fit for 38-43mm Hole

Main Features ENVIRONMENTALLY FRIENDLY MATERIAL: The trap drain made of premium eco-friendly silicone material, no smell and no toxic. UNIQUE DESIGN: The floor drain is designed in V-cup shape, which ensures smooth draining and quicker water flowrate. Unique S-shape automatic closing design can strongly prevent backflow. PRACTICAL FUNCTIONS: The floor drain filter with the automatic closing design, Prevent the drain water from backing up to the room; Anti- water leakage and overflow. WIDELY USE: This item can be used with floor drain of the shower room and basement. Floor drain seal with closing mouth can be used in floor drain universal for most of families. Necessary for every family. Installation guide: 1.Measure the depth of the tube. 2.Install the floor drain one way valve. 3. Because of the stickiness and softness features of silicone, make sure support apart the mouth of drain grate with your hands in the first installation for the smooth draining. Product Specifications Product Name: Drain Backflow Preventer. Material: Silicone. Fits for holes with diameter of 38-43mm. Color: White. Package Content: 2 Pcs. Please measure precisely the internal diameter of the drain mouth, in case any inconvenience brought by unmatched size. If you have any problems, we are very willing to solve the problems for you.?