Quiet Concealed Diaphragm Type Rough Brass Flushometer for either left or right hand supply with the following features: Dual Filtered By-Pass Diaphragm Handle Packing Stop Seat and Vacuum Breaker to be molded from PERMEX rubber compound for Chloramine resistance Metal Direct Acting Non-Hold-Open Push Button (or ADA Lever Handle with 195 model) with Triple Seal Handle Packing Wheel Handle Bak-Chek Angle Stop Adjustable Tailpiece Sweat Solder Adapter Chrome Plated Exposed Parts High Copper Low Zinc Brass Castings for Dezincification Resistance Flush Accuracy Controlled by CID. Technology High Back Pressure Vacuum Breaker Elbow Flush Connection. Valve Body Cover Tailpiece and Control Stop shall be in conformance with ASTM Alloy Classification for Semi-Red Brass. Valve shall be in compliance to the applicable sections of ASSE 1037 NSI/ASME 112.19.6 and Military Specification V-29193. L Dimension Specify the L Dimension for the proper length of the Handle Assembly and Flush Connection. For Models 152 and 195 - The L. Dimension is equal to the Wall Thickness plus 2-3/4. For Model 603 - The L. Dimension is equal to the Wall Thickness plus 4-1/4.