Naval Concealed Water Closet Flushometers Quiet, Concealed, Adjustable Piston Type, Rough Brass Closet Flushometer for either left or right hand supply with the following features:Self-cleaning Xpelor ® Bypass 1" I.P.S. Wheel Handle Bak-Chek Angle Stop Adjustable Tailpiece Vacuum Breaker Flush Connection Exposed parts Chrome Plated Ultra High Copper, Low Zinc Brass Castings for Dezincification and Salt Water Resistance Handle Packing, Stop Seat and Vacuum Breaker molded from PERMEX Rubber Compound for Chloramine Resistance