WaterSense labeled faucets use at least 20% less water than the industry standard - helping you save water without compromising performance. SINGLE HOLE BATHROOM FAUCET: Fits 1 or 3-hole 4 in. CHEMICAL-RESISTANT SURFACE: Oil Rubbed Bronze bathroom faucet surface is tested to withstand 16 hours of exposure to 7 harsh cleaning chemicals without corroding or discoloring.