Delta's exclusive DIAMOND Seal Technology uses a valve with a tough diamond coating. InnoFlex PEX waterways keep water inside the faucet out of contact with potential metal contaminants. This powerful combination brings you a faucet built to last up to, DIAMOND Seal Technology features a valve embedded with diamonds to ensure like-new operation for the life of the faucet, Meets standards set by Americans with Disabilities Act, Touch-Clean spray holes allow for easy removal of hard water build-up, Includes optional 10-3/4" escutcheon/base, 1 or 3-hole 8 in. installation