Simplify your plumbing and home improvement projects with the EZ-FLO kitchen sink strainer. Ideal for cast iron and composite sinks, this stainless sink strainer is equipped with a 4-1/2 inch flange and die-cast slip-joint nut. This strainer features a deep locking cup and a fixed post basket. The post-basket of this strainer has an open-close function. This easy-to-install strainer fits a sink with a 3-1/2 inch to 4 inch opening.