Keep your sink running efficiently with this Dearborn by Oatey Spin-N-Lock 4 1/2" stainless steel sink basket strainer with screw-in basket. Made from heavy-duty, chrome-plated stainless steel, this sink basket strainer is built to fit sinks with a 3 1/2" to 4" opening. Incredibly durable and reliable, it features a positive seal that prevents the loss of water and suds. This sink basket strainer is designed with a 4 1/2" flanged diameter and a screw-in basket for simple installation. It also includes an extra thick washer and an extra wide locknut. Overall Dimensions: Diameter: 4 1/2"