Small Diameter Basin Drain, fits old sinks without overflow. 4″ long overall, threaded shank diameter is 1 5/16″. Thread pitch is 1″ IPS, flange O.D. is 1 15/16″, supplied less tailpiece. Finish is Milled brass, this can be polished and/or Plated for an additional fee. Intended for Old style Lead/Oakum joints. Creative plumbing will be required to get this drain to modern plumbing.