ULTGRT Water Filter Faucet, 100% Lead-Free Kitchen Water Filter Faucet for Reverse Osmosis System and Water Filtration System Features: Single Lever for easy control Solid stainless steel construction 100% test before leaving factory Heavy duty ceramic valve core, can survive 600000 times operation 100% Lead-free SUS304 stainless steel, ensure no Rust 1 Hole Deck Mounted. No air gap drinking water faucet. Only one Hose can be connected. (No Hoses Included) Not a regular hot and cold water kitchen sink or bar sink faucet, only for cold water. INSTALLATION INSTRUCTION: 1. Max Thickness of Counter top: 2.3 inch 2. The diameter of the opening hole is between 0.47 inch - 1.57 inch. 3. Package included: 1x Water Filter Faucet 1x Decorative Cover Plate 1x Rubber Washer 1x Anti-loosening nut 1x 1/4" Quick Fiting-1/2”Female Thread 1x 1/4" Quick Fiting-3/8" Quick Fiting 1x 1/4" Quick Fitting-1/4" Quick Fitting 1x Installation Manual Meet your various installation needs,you can choose the suitable size to use.