3-1/2 Inch Sink Drain Assembly Kit, Removable Deep Sink Strainer Basket with Sink Stopper/Sealing Lid for Home, Kitchen, Stainless Steel304 Stainless Steel Standard size 3 1 2 inches opening: Fits most American family commercial kitchen sinks. Fits sinks with 3. 23 4. 45 inches opening. Height of this kitchen sink drain is 3. 85. Please measure to ensure compatibility with existing plumbing before buying Well made 304 stainless steel construction, except plastic nut (Metal nut will corrode, bonding the nut to the strainer) and brushed nickel finish. Good material protect against