Regal Exposed Water Closet Flushometers Quiet, Exposed, Diaphragm Type, Chrome Plated Closet Flushometer with the following features:ADA Compliant Metal Oscillating Non-Hold-Open Handle 1 I.P.S. Screwdriver Bak-Chek Angle Stop Vandal Resistant Stop Cap Adjustable Tailpiece Vacuum Breaker High Copper, Low Zinc Brass Castings for Dezincification Resistance Non-Hold-Open Handle and No External Volume Adjustment to Ensure Water Conservation Low Consumption flush accuracy controlled by Para-Flo Technology Handle Packing, Stop Seat and Vacuum Breaker molded from PERMEX Rubber Compound for Chloramine Resistance