KleenWater Chrome Drinking Water Kitchen Faucet, Air Gap Reverse Osmosis RO Faucet, Luxury European Style, Compatible with 1/4" and 3/8" water line Chrome Elegant Euro Style Design and Easy Installation Lead Free - Conforms with Federal Reduction of Lead Act 2014 the minimum mounting hole required is 1 1/4" diameter. The maximum hole diameter covered by the escutcheon plate is 1 5/8" Compatible with both 1/4" and 3/8" water line -Free and Fast Shipping Includes 3/8" Drain Clamp and Drain Tubing