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 You can install with confidence, knowing Delta bathroom faucets are backed by Delta Faucet's Lifetime Limited Warranty