Whitehaus Collection's 3 1/2 " basket strainer is manufactured specifically for all 3 ½" kitchen sinks stainless steel and copper along with the Quatro Alcove fireclay applications. Will not fit a deep fireclay sink application. Available in ten different finishes, allows you to match the basket strainer to your faucet adding to the beauty of any kitchen. The strainer prevents any unwanted debris from going down the drain. Made from metal on top side and PVC on the underside, this strainer is designed to last!