Faucet Features:Chrome, Brushed Nickel, White, Black, and Oil Rubbed Bronze Finish.Variable Flow Lever for dispensing.Top Mount Design - you'll never need to crawl below the sink again!Reduces installation labor.Totally lead free (components are stainless steel or non-metallic).Available with or without monitor. Monitor reminds customers when to change cartridges for water quality assurance.Ceramic disc for durability.One style works for air gap and non air gap installations.NSF certified for material requirements. Air Gap: This faucet conforms to US plumbing codes and is designed for dispensing water from a Reverse Osmosis system or a Water Filtration system that requires a drain connection with an Air-Gap.Width: 2.25 (inches at base)Height: 11.50 (inches from base to top of curve)Monitor:Monitor faucets eliminate guesswork and remind customers when cartridge replacements are necessary to provide top quality assurance.How they work:Monitors tract time and estimate gallons based on handle turns.LED flashes red after six months or after it estimates 4,000 gallons of water have been used by the system.Each time cartridges are replaced a new batter is recommended.New batter will reset the monitor and LED indicator is again blue. Battery replacement: WTMFBATTubing Specifications:3/8 inch Blue collet for the product drinking water line.1/4 inch Red collet for connecting to the rinse water portion of the filtration system.3/8 inch Black collet for the connection to the drain.Tubing not included.