Model 5510LF compression gooseneck faucet is designed with a .5 gpm aerator and stay-open lever handle action to provide a smooth flowing stream of water. Unit is to be mounted from sink or counter top and is constructed from lead-free polished chrome-plated brass, making this faucet resistant to corrosive materials and easy to keep clean. Gooseneck faucet incorporates: renewable seat, mounting pin to prevent base from turning, aerator with key, and integral basin shank. Dimensions: Center supply to center spout outlet is 4-1/2", bottom of flange to extreme top of faucet is 10-3/8", bottom of flange to spout outlet is 6-3/16", and flange diameter is 2". Connection is a 1/2" IPS inlet. Haws manufactures drinking fountains and electric water coolers to be lead-free by all known definitions including ANSI/NSF Standard 61, Section 9, California Proposition 65, and the Federal Safe Drinking Water Act. Product is compliant to California Health and Safety Code 116875 (AB 1953-2006).