The body of the grille seal is made of good quality silicone, a completely environmentally friendly material; No odor and no toxic; Protect your family's health; No worry about deformation after stretching, super flexible. Our floor drain seal core is your new choice for drain problems. It's an easy installation, with no modification to existing outlets. Let you spend less to enjoy a healthy environment, saving volume for plumbing work. Take full advantage of the theory of gravity and the silicone specialty, the drain filter floor is designed in a V-cut shape, ensuring smooth drainage and water flow; fold wrinkles between binding, increase tightness and compactness. When draining, it is linear drainage, automatically closes after being drained. Physical methods are healthier than chemical liquids. Multi-PROPOSED Drain Backflow Preventer - 1. Work as a Hair Catcher 2 drain. With automatic closing design, it can effectively block insects, bacteria; Seal the stinky smell and smell of sewer gas; Prevent drain water from flowing back into the room; Anti-leakage and water overflow. WIDE RANGE OF APPLICATIONS - As the sewer is connected to the underground septic tank, sewage, insects or other toxic air can enter the room from a smelly drain. The floor drain seal with closing mouth can be used in the universal floor drain for most American families: bathroom, kitchen, toilet, powder room, basement, garage, laundry room, etc. Necessary for every family. Delivery quantity: Four pieces