Delta T17T085 Grail Tempassure 17T Series Valve Trim Only, Chrome Requires R10000-UNBX Rough Valve See Delta price book for additional available rough-in valves Grail offers a complete suite of products for the bath and kitchen, including a full line of matching accessories Two function cartridge - lever controls volume and dial controls temperature Flexibility is the big benefit of the MultiChoice(R) Universal Valve. Once the MultiChoice(R) rough is installed, future shower function upgrades or style changes can easily be made without altering the plumbing behind the wall