GEM Exposed Water Closet Flushometers Quiet, Exposed, Piston Type, Chrome Plated Closet Flushometer with the following features: Fixed Volume Piston with Filtered O-Ring By-Pass ADA Compliant Metal Oscillating Handle 1" I.P.S. Screwdriver Bak-Chek Angle Stop Vandal Resistant Stop Cap Adjustable Tailpiece Vacuum Breaker Flush Connection High Copper, Low Zinc Brass Castings for Dezincification Resistance Non-Hold Open Handle and No External Volume Adjustament to Ensure Water Conservation Handle Packing, Stop Seat and Vacuum Breaker molded from PERMEX Rubber Compound for Chloramine ResistanceValve Body, Cover, Tailpiece