This Westbrass decorative high flow grid drain with overflow holes fits standard sink drains and features an ultra high flow, crowned, grid style lavatory drain which prevents blockage and overflow. Fully finished for exposed installation. Fits 1-1/2 inch Opening with 1-1/4 inch Tailpiece and 3 inch Threading for thick sinks. Brass construction. Available in a variety of stylish finishes, this item is sure to complement your existing fixturesWestbrass Fine Decorative Plumbing since 1935.