1. [Design] The water tank filter umbrella has a double-layer (inner and outer) design. It shows good corrosion resistance, is relatively easy to clean, is not prone to falling off, and is waterproof. 2. Material: The sink strainer is made of stainless steel and PVC. It resists rust and corrosion and is relatively easy to clean. 3. Installation: There is no need to paste Teflon tape, gaskets or screw bolts on the top and bottom of the sink. 4. Application scope: The drain strainer is suitable for sinks with a diameter ranging from 110 mm to 114 mm. A recommended sink diameter is 83 - 90 mm. Please note the diameters of the sink filter plug and its rubber ring. 5. Applications: The sink drain assembly consists of a strainer and a plug. It can collect food residues and perform a filtering function to help avoid pipe blockages. It can also be used as a plug to retain water in the kitchen sink.