3-1/2 Inch Sink Strainer: LYNNADO sink strainer fits most standard American kitchen sinks with a 3.5 inch drain hole and fits a sink with an opening of 3.23 inch to 4.45 inch. The height of this kitchen sink drain is 3.85 inch. 304 STAINLESS STEEL DRAIN CONSTRUCTION: This kitchen sink drain basket assembly kit is made of high quality 304 stainless steel, except for the plastic nut and rubber washer with brushed nickel finish. PACKAGE INCLUDED: removable deep kitchen sink drain basket, sink plug and sealing cover. RELIABLE SEALING FUNCTION: Also can be used as a sink plug, waterproof rubber ring and reliable seal to prevent water from flowing into the drain. Can store water for washing things. Note: The data is purely manual measurement, please allow 1-3cm error. Delivery quantity: (according to the main picture)