Delta Faucet Dryden Single-Handle Bathroom Faucet with Diamond Seal Technology and Metal Drain Assembly, Aged Pewter 551-PT-DST LIFETIME LIMITED WARRANTY. You can install with confidence, knowing this bathroom faucet is backed by Delta Faucet's Lifetime Limited Warranty LASTS 2X LONGER. DIAMOND Seal Technology uses a patented design to reduce leak points and last twice as long as the industry standard (Industry standard is based on ASME A112.18.1 of 500,000 cycles) SUPPLY LINES INCLUDED. InnoFlex PEX supply lines are integrated into the faucet for one less potential leak point and are conveniently included in the box LEAK-FREE FOR LIFE. DIAMOND Valve, a diamond-embedded ceramic disc, requires no lubrication and eliminates wear on seals, so you can rest assured that this faucet will perform like new for life EASY INSTALLATION. Designed to fit single-hole or 3-hole, 4-in. configurations. Everything you need is together in one box, including an optional deck plate for 3-hole installation and coordinating metal pop-up drain assembly