Simple, clean lines with dependable KOHLER quality-the 5" gooseneck lavatory spout with flange features solid brass construction and offers 2.5 gpm flow. Brass construction. 5" (127 mm) gooseneck spout. Standard aerator. Lower flow aerator options available (see Kohler Price Book). Flange External NPT connection. 2.2 gal/min (8.3 l/min) maximum flow rate [max at 60 psi (4.14 bar)].