Dearborn L7 Lucky 7 Sink Basket Strainer, Chrome Plated Brass Body w/ SS Basket, Metal Post, Heavy Locknut, Rubber Stopper, Thick Washer, Machine Cut Threads. With reversible lock nut for make-up with cast iron sinks High-quality stainless steel stick post basket and 4-3/8? flange diameter Includes metal post, heavy locknut, rubber stopper, extra thick washer, and machine cut threads Resists corrosion - maintains new appearance Easy installation and cleaning