ROUGH SOLD SEPARATELY: Trim kit only, purchase Delta's MultiChoice Universal Shower Valve separately to complete the unit (recommended rough-in valve model R10000-UNBXHF) PROTECTION FROM SUDDEN TEMPERATURE CHANGES. The TempAssure Thermostatic Valve Cartridge ensures a consistent shower temperature, while the dual-function shower handle allows you to control the water temperature and volume separately for maximum control DUAL FUNCTION HANDLE: Control volume and water temperature independently with two separate handles for more refined control of your shower faucet INSTALLATION: Installing this product may require removal of existing tile or shower walls if current valve body is not a Delta MultiChoice Universal Valve. Consider consultation with an installation professional prior to purchase LIFETIME LIMITED WARRANTY: You can install with confidence, knowing this Delta shower trim kit is backed by Delta Faucet's Lifetime Limited Warranty. Backed by Delta Faucet's Lifetime Limited Warranty