Delta Faucet 72175 Square Push Pop-Up with Overflow, Chrome All metal construction push pop Tailpiece Chrome plated for all finishes For use with sinks with overflow Best paired with square featured lavs With overflow holes - for use with lavatory sinks with built-in overflow drain holes Fits sink with standard 1 5/8" drain hole size 2 11/16" square top flange All metal construction push pop Tailpiece chrome plated for all finishes