KOHLER K-11677-CP Swiftflo Adjustable Trip Lever Drain, 20-Gauge Brass, For 18-1/2-Inch To 20-1/2-Inch Baths, Polished Chrome
This Swiftflo adjustable trip lever drain with features solid-solid brass construction, an adjustable trip lever and removable grid strainer.  It works with 18-1/2-Inch to 20-1/2-Inch deep baths with through-the-floor installations.