GUARANTEED QUALITY: Quality is our top priority, so all our bathroom sink faucets are tested and certified, meeting or exceeding industry codes and standards EASY DIY INSTALLATION: Purposefully designed to install in 5 simple steps, with step-by-step instruction videos and tips available on Delta Faucet’s YouTube channel. The 3 hole bathroom faucet fits 3-hole 4 in. centerset installations LASTS 2X LONGER: Patented DIAMOND Seal Technology reduces leak points and lasts twice as long as the industry standard—ensuring leak-free operation for the life of the bathroom sink faucet 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