Regal Concealed Water Closet Flushometers Quiet, Concealed, Diaphragm Type, Rough Brass Closet Flushometer for either left or right hand supply with the following features:1" I.P.S. Wheel Handle Bak-Chek. Angle StopAdjustable TailpieceVacuum BreakerExposed Parts Chrome PlatedHigh Copper, Low Zinc Brass Castings for Dezincification ResistanceNon-Hold-Open Handle and No External Volume Adjustment to Ensure Water ConservationLow Consumption flush accuracy controlled by Para-Flo TechnologyHandle Packing, Stop Seat and Vacuum Breaker molded from PERMEX Rubber Compound for Chloramine Resistance