Sloan Valve G2-81111 Optima Plus Battery Powered Sensor Operated 1.6 GPF Water Closet Flushometer, Chrome 11-1/2-Inch height (to center of inlet), used for Floor Mounted Or Wall Hung Top Spud Bowls Features: Exposed valve PERMEX Synthetic Rubber Diaphragm with Dual Filtered Fixed Bypass Flex Tube Diaphragm designed for improved life and reduced maintenance ADA Compliant OPTIMA Plus Battery Powered Infrared Sensor for automatic "No Hands" operation