Elkay LK654 Chrome Concealed Deck Metered Lavatory Faucet with Cast Fixed Spout and Push Button Handle ADA COMPLIANT: Faucet is ADA compliant. LEAD-FREE COMPLIANT: Certified to NSF/ANSI 61 and 372 to meet all federal and state regulations for low or no-lead products. SOLID BRASS CONSTRUCTION: Built for long-term durability. VANDAL-RESISTANT AERATOR: Includes a special key to remove and change out the aerator; ideal for public spaces. 1 FAUCET HOLE: Faucet designed to be installed using one faucet hole.