This Standard Kitchen Sink Drain Assembly is made of highly durable stainless steel and includes a strainer basket which works as a strainer or a plug, depending on which way you want it designed with a stylish look to match your kitchen. And has a fixed post Stopper with a rubber seal, to close the drain. The size of the strainer is great for all standard Kitchen sinks with an opening of about 3-1/2 – 4 Inch. It’s super easy to clean by removing the basket