["Features:\nbrand new and high quality\nLarge displacement design. Insect, pest and rodent prevention, odor control.\nMagnetic suspension deodorization is adopted to seal the cover more closely. \nEffectively realize deodorization and overflow prevention, and protect family for health.\nLarge drainage capacity, effectively prevent sewer backflow, flushing more quickly.\nThe reducer ring can be used for flexible replacement without worrying about size.\nCan be used with floor drains in bathrooms, bathrooms, basements and laundry rooms.\nPlug and for play design, simple and convenient installation, no need to change the existing floor drain.\nSilicone ring has good toughness, can resist aging, and can maintain elastic seal for a long for time.\nStainless steel reducing ring, durable and corrosion-resistant, can effectively prevent deformation.\n\nProduct Size and Using method(as pictures shown): \n1. Diameter: 35-37mm, use the product directly;\n2. Diameter: 37-44mm, add silicone ring;\n3. Diameter: 44-52mm, use reducing ring.\n\nSpecification:\nMaterial: Plastic+Metal\nColor: Blue+Red\nSize: app. 5.3x4.2cm(2.09x1.65in)\nQuantity: 1 set\n\nNote:\nTransition: 1cm=10mm=0.39inch\nNo retail package.\nPlease allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage includes:\n1 x Drain Backflow Preventer\n1 x Silicone Seal Ring\n1 x Reducing Ring\n(other accessories demo in the picture is not included.)"]