ROUGH SOLD SEPARATELY: Faucet trim only, purchase Delta's Faucet Valve separately to complete the unit (recommended rough-in valve model R3510-WL) INSTALLATION: Designed to fit 3-hole 8" wall configuration. Installing this product may require removal of existing tile if current valve body is not a Delta Facuet Wall Valve RELIABLE VALVE: Ceramic valve disc is tested to last at least 500,000 uses to ensure high performance with less drips and a smooth bathroom faucet handle operation. CORROSION-RESISTANT FINISH: Our Brilliance finishes are intentionally engineered for durability and tested for corrosion resistance to at least 2 times industry standards TESTED AND CERTIFIED: All Delta bathroom faucet finishes are third-party certified and vigorously tested under extreme conditions to ensure years of dependable use without cracking, peeling, chipping, blistering or changing color over time