GUARANTEED QUALITY: Quality is our top priority, so all our bathroom sink faucets are tested and certified, meeting or exceeding industry codes and standards SINGLE HOLE BATHROOM FAUCET: Fits 1 or 3-hole 4 in. installations, optional deck plate (included) with gasket seal helps prevent drips and splashes from leaking under the bathroom sink faucet RELIABLE CERAMIC VALVE: Ceramic disc valve cartridge 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 NO LEAD COMPLIANT: Every Delta faucet is certified to NSF/ANSI Standard 61, which sets the criteria for product safety. Not all bathroom faucets are certified, so it is important to always check for NSF/ANSI 61 certification when buying a faucet EASY-TO-CLEAN DRAIN: Push pop-up drain unscrews from above the deck for quick removal and easy cleaning of hair and other bathroom sink debris LIFETIME LIMITED WARRANTY: You can install with confidence, knowing all Delta bathroom faucets are backed by our warranty