Delta T14292 Addison Monitor 14 Series Shower Trim, Chrome SH 2.0 gpm,7.6 L/min Must purchase rough-in R10000-UNBX separately Maintains a balanced pressure of hot and cold water even when a valve is turned on or off elsewhere in the system Rough-in valve R10000-UNBX sold separately Single function pressure balance cartridge - handle adjusts temperature Zinc