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 RELIABLE VALVE: 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: Delta Matte Black faucet finishes are salt fog tested, meaning they withstand a corrosive, chemical solution for over 12 hours, triple the required industry standard, without blistering, cracking or peeling CHEMICAL-RESISTANT SURFACE: Matte Black bathroom faucet surface is tested to withstand 16 hours of exposure to 7 harsh cleaning chemicals without corroding or discoloring.